The globe is identical to the previous LR as far as I could tell. Same size, same vinyl liner.
The base has some major improvements.
The drawer is now nearly two inches deeper than the previous drawer. Unfortunately this raises the step an inch or two higher off the floor so if your cat was skittish about stepping up into the LR, you'll have to put a phonebook or something under the step to ease the transition. This also makes the LR2 a couple of inches taller than the previous LR (29") so if your present LR is in a tight location, this may be a problem.
Notice that there is no lip hanging from the top of the drawer slot. In the previous model, this lip compressed a gasket in the drawer that was supposed to reduce the smell, but it also did a great job of skimming off the top of the contents of the drawer when you pulled it out, knocking all of it back into the base. This lip also tended to collect the drawer scrapings and cleaning it was a little tricky because the vulnerable circuit board was just above it. More on how they fixed that later.
Note that the base is finally designed to be safely cleaned! The corrugated bottom which collected any litter that fell out of the drawer and made it impossible to completely clean has been replaced with this slotted but mostly smooth bottom with no unreachable areas (although the area behind the motor base is a little difficult). Note that the motor on the right which was previously bolted onto the side and completely exposed is now sitting on a plastic base. This allows you to clean around it without worrying about getting moisture into it and blowing your circuit board (uh, or so I've heard). The board itself is still behind the control panel but instead of being "protected" by a strip of duct tape, it's now in a sealed compartment making it safe to clean that area too.
Since the motor isn't attached directly to the side of the base, this reduces the noise a little. I ran both LRs with my head between them and while the LR2 was certainly less noisy, it wasn't as less noisy as I had expected. Still, the new motor in both models is much much quieter than the "cordless drill" sound of the original LR with no grinding noise and only a high-pitched whirr that won't echo around your house.
Also the sensor switch, which for some reason has always been totally exposed to collect gunk and fail in previous models, finally has a cover that completely protects it. I always covered it with gaffer's tape.
Here's the old drawer and the new drawer:
The first thing you see is that the step has holes in it to reduce litter tracking. This is a clever idea but I have to say it isn't very effective. The holes are too small, too far apart, and only catch a fraction of the litter tracked out of the globe. By the end of the weekend the entire step was covered in litter except for the spots where litter had found itself directly over a hole. There was actually more litter on the step than in the step.
If your cat has a habit of peeing on the step, the new one will at least keep most of it from pouring onto your floor.
The two corrugated slots which served to strengthen the drawer have been replaced with a triangular slot which also tries to keep the waste from piling up in the center of the drawer. I found this works at first, but once the waste reaches the peak of the triangle, it starts piling up in one spot like it did before. Maybe it would have been better to keep the smaller slots to maximize the drawer volume instead.
The metal clips have been replaced with rubber grommets. You just poke a loose part of the bag into the grommet hole and it grabs right onto it. Now you don't have to worry about the clips tearing holes into the bag when you pull it out.
One concern is that there is no gasket behind the step. In fact I found no sealing at all around the drawer. I don't have stink problems so I can't say whether or not this will be a problem. There is one change to the new drawer that I'm sure will help reduce the stink:
The back of the old drawer has this half-inch gap to accomdate the lip that presses against the gasket behind the step. Did it ever make sense to tightly seal the front of the drawer only to leave a huge gap for the odors to flow freely out of the back of the drawer? It sure didn't make sense to me. This drawer gap also made sure that any waste scraped by that stupid lip when you pull drawer out would have a free path out of the drawer straight into the uncleanable base. I think the APCP people have given up on the flawed gasket system and decided to just minimize the gaps around the drawer to keep the odor in it.
You'll also notice that the drawer is about 1.5 inches deeper than the old drawer. You'll want this if your cat (like mine) creates jumbo-sized clumps that quickly smear over the globe you just cleaned. With the old model I would usually see some residue on the port doors within a day of cleaning the globe because an oversized clump didn't fit into the drawer. After two days I have not seen any gunk on the globe at all. The clumps have farther to fall and large ones are less likely to be sticking over the top of the drawer when the door closes and the globe rotates back.
The drawer is still small enough to fit into cheap tall kitchen bags:
Note how the rubber grommets do a great job of hanging onto the bag.
Two other small features not shown. The LR2 now has an on/off switch. Yes, you read that right. You can actually turn it off without unplugging it now. And speaking of unplugging it, they've made a subtle change to how the DC adapter plugs into the base. The connector is now mounted vertically on the base instead of on its side. This will make it less likely for the LR to become accidentally unplugged by a clever cat or a klutzy human.

