You think those statistics show 2 pretty even seasons? ARE YOU HIGH?
Drew Brees's QB rating was 10th, immediately behind Plummer, Green, and Leftwich. Eli's QB rating was 23rd, immediately behind Collins, Carr, and Dilfer. Oh yeah, clearly those are "pretty even" seasons. Clearly, any objective viewer would conclude that David Carr and Trent Green are more or less the same ballpark.
Brees's YPA was 12th, behind Plummer, Bledsoe, and Warner. Eli's YPA was 17th, behind an injured McNabb, Dilfer, and McCown. Again, sure, that's just a minor difference. Really inconsequential, truly.
Completion percentage. Brees was 6th, right behind PEYTON Manning, Bulger, and Hasselbeck. Eli was 31st (out of 34 total), behind Aaron Brooks, Michael Vick, and Kerry Collins.
TD Percentage. Drew Brees, 10th in the NFL, right behind Leftwich, Brady, and Bulger. Eli Manning, 14th in the NFL, right behind Bledsoe, McNabb, and Holcomb. Actually, in this category, their seasons really WERE reasonably similar- although the edge still goes to Brees.
INT Percentage. Drew Brees, 18th. Eli Manning, 19th. Another marginal difference, although once again the edge goes to Brees, however thin it might be.
So, let's see... in TD and INT percentage, they were pretty close, although Brees got the edge in both categories. In Comp%, QBRating, and Yards per attempt, Brees blew Manning out of the water. Those are not SIMILAR seasons, that is clearly a FAR BETTER season by Brees- especially when you consider he played against the toughest schedule in the entire NFL.