90 vs 88.Both very nice and a tough choice.You can also throw in the 104 and 164.
90 ~ I like the power reserve dial,but no the small minute markers
88 ~ Dont like the skeleton hands and the silver second dial
Thats the negatives,but overall both very nice and you cant go wrong with either.
As my first choice I had a look at all of these and liked the 104 the best.Its my first PAM and the one I wear most.