You can't expect Biggie's Ready to Die to resonate with him as much as say, a 30-35 year old from New York, or anyone growing up in New York in general or that age in general.
When Biggie was murdered, Drake was what, 10-11 years old? Whoever said he heard the albums with a clean slate is right. So if that's what Drake wants to compare them to, then so be it. That's just his opinion.
However, at the same time, I'd like to think he was just promoting the album for Ross with some attention grabbing talk rather than being serious. Let's look at who Biggie and Snoop are/were. Biggie is the real deal, from street guy to superstar. No one's ever questioning Biggie's authenticity. His story was his story, that's why he told it and that's why people felt it. Snoop is like 20 years deep in the game. He's put out multiple classic songs and albums, transcended through more than a handful of changes in rap music and is still relevant.
Now I'm not saying Rick Ross's new album won't be good music, but at the end of the day, he's just an entertainer. We don't know the man behind the beard and glasses, and the music doesn't help us get to know him. Rick Ross albums are like the soundtracks to gangster movies. It's like if a screenwriter wrote a movie based off of Blow, Cocaine Cowboys, Paid in Full, and Scarface, and named the movie God Forgives, I Won't, that's what Ross's album sounds like. If for no other reason, the fact that Biggie and Snoop took you into THEIR actual world with every song, bar, and verse, is why it's "questionable" for Drake to make the comparison.
But that's just my opinion.