I'm not a Pats fan but obviously it's better to have a regular season MVP and a super bowl victory. Besides, super bowl MVPs are kind of cheap; they're almost always awarded to the quarterback of the winning team.
On the other hand, regular season MVPs are much more difficult to attain because even though QBs are favored to win it, there's a lot of competition amongst QBs to see who will get it.
Brady has to compete with Peyton Manning, Drew Brees, Philip Rivers, and Aaron Rodgers every year to win the regular season MVP, and that's just counting the quarterbacks.
First of all, regular season MVP's rarely win the SB. The last QB MVP to win an SB and an SB MVP was Kurt Warner in 1999/2000.
So 11 years of data suggest that the League MVP is an individual award and not necessarily predictive of team supremacy.
I probably actually agree with you that the League MVP is a more prestigious personal award, but ultimately I feel that this is a team game, as I know perennial greats like Brady and P. Manning also feel, as well as the newest members of their rather exclusive club, Drew Brees and Aaron Rodgers, would agree (no disrespect intended, but I'm afraid that Phillip Rivers has to do better than one trip past the Divisional round and an overall 3--4 Playoff record to be mentioned in the same breath with those guys, in my book).
But, I think that the SB MVP is worth a lot more than you allow. And, you really ought to check your facts before you make a statement like
"...super bowl MVPs are kind of cheap; they're almost always awarded to the quarterback of the winning team."
45 Super Bowls have been played and there have been 46 SB MVP's (Harvey Martin and Randy White, both Defensive players, were co-mvp's in that memorable SB XII between the Cowboys and Broncos).
Of the 46, only 24 have been the starting QB, so if you consider 52% "almost always" you are using the term quite loosely.
37 of the awards have gone to players on the offense, so you could probably legitimately say that the SB MVP is "almost always" on the Offense (80%), eight have gone to players on the D and one (Desmond Howard in the Packers defeat of the Patriots in 1996) to a Special Teams player. The award was given to a player on the losing team once, Chuck Howley of the Colts in their classic loss to the (B) Colts in SB V.
So, I guess it comes in part from watching my team go to six SB's over the years, but I realize how hard it is to get to that game and believe strongly that the SB MVP Award is indeed not "cheap." Perhaps you'll see it differently when and if your team gets back there for a second time after, what?, 13 years.