Rings change things, they just do.
IMO, stats are very misleading when looking at Flacco. The offensive talent has been very poor around him for years. Oline, running backs, pass catchers, all poor. Trying to compare his stats to Dalton or even Tanny or Smith doesn't work because they have been in superior offensive systems with superior talent around them.
I would take Flacco in Buffalo any day of the week. Those other guys, meh, maybe Dalton.