What is there is a building with 100+ floors where all residents have the same billing address...it means Google will ban all of them? It doesn't make sense...
does each one of those residents have websites? It doesn't make sense....
Seriously, though, you don't want to know the truth, you just want to be lied that google doesn't know everything about people using their products just so you can have peace of mind. But I'm not gonna do that (lie to you), but I also don't know whether they have linked your 2 sites already. But I do think (no proof) that they can link the 2 sites together.
About 8 or 9 years ago I was trying to see what brands of boxers (a type of underwear as we call it here in romania) are there available, and I didn't even finish typing the word boxer into google, much less type the whole keyword I was having in mind (boxer brands), that google had already recommended me that exact keyword in position #1. And the reason for which this is both interesting and scary is that boxer, in Romanian, can refer to 3 different things:
- underwear
- dog breed (there's a dog breed that we call boxer)
- pugilist
And like I said, I have never in my entire life been interested in boxers (the underwear), not even today, I don't wear such things. But, for some reason, I have needed to know what boxer brands are there, so I had to google it, out of curiosity. So, how did google know what I was having in mind, given that I've never shown interest in that word and given that I was typing it from my own personal computer to whom only I have access? I could have meant to search for the pugilist, or for the dog breed, but google knew that I was exactly meaning the underwear. You tell me how they knew this! And that was 9 years ago...
Do you really think that with today's (nano) technology, tracking technology, and with the legions of statisticians, mathematicians, linguists and psychologists that google employs they're unable to link 2 sites with the same address together to find out who those sites belong to? And if you're still not convinced then tell me why experienced SEOs pour their life savings into making sure that every PBN they set up has unique and random everything (IPs, whois details, billing details, hosting providers, etc)
Anyway, I'm not trying to convince you of anything (I'd need proof for that, and I don't have it), but I did try to tell you the truth (as I perceive it, yes). If you can disprove it (but I will also require proof), feel free to do so!