Nas has three certified 5 mic classics (Illmatic, It Was Written and Lost Tapes) and a lot of 4 to 4.5 mic near classics (I Am..., Stillmatic, God's Son, Untitled, Distant Relatives, Life Is Good). Jay's only 5 mic certified classic is Reasonable Doubt to me. His pen game took a huge dive after that. Blueprint is more like a 4.5 micer (no album with Jigga that nikka on it can be a 5 mic, sorry). TBA and AG are like 4 to 4.5 mics, also. Don't make me laugh with that Vol. 2 is a classic shyt either, that shyt is garbage. Kendrick's only true 5 mic is GKMC to me, although I can get how people would say TPAB is also a 5 mic. Not mad at people saying that, it's just a little too soft and neo-soul for my personal tastes.
So when it comes to classics, Nas > K. Dot > Jay.