Yes, this idea that they are in the same apartment complex or adjacent buildings has been discussed many times, but never fully resolved. The same metal cutting buzz-saw sounds have often been heard both at L&Ps and M&S's apartments, at the same exact time, though it was louder at M&S's apartment. Since the layout of these two apartments is very different, this suggests that they are adjacent buildings, possibly near a metal recycling operation. This would most likely put them on the south side of the river which, from Google Earth, one can clearly see is an industrial section dotted about with large Soviet era apartment buildings. Hence, you are suggesting that A&A's apartment is in the same building as M&S, and you could be correct.
We've also discussed the appearance of specific pizza boxes, shopping backs from specific stores, and KFC buckets, all in the quest to understand the connections between the couples and where they shop and live. Lina and Mark, formerly in L&P's apartment, often party with M&S. Lora and Max supposedly were within walking distance to another couples apartment. Leora is either Lina's friend or more likely cousin -- the speculation continues. Certainly Lina "recruited" Maya and probably Leora for RLC.
I personally like the idea that the entire thing is a fraud, and it's filmed in the the same studio in which the Americans faked the moon landing. I don't believe it, but it's fun and hilarious to think about these things.
I see you're new to CamCaps. Welcome to the zoo. We're more fun than a barrel of monkeys, but be careful around the chimpanzees...they like to throw shit at newbies when they walk by the chimp cage... ;D ;D ;D
When the maintenance guy was at Katya and Ruslans flat sawing away, you could faintly hear a sawing noise at Sofia and Romans flat, so likely they are not to far apart.
Hopefully soon they reopen the other 2 apartments where Nora and Kiko and Lora and Max once lived.