well I have three different models in my set.
4 iron is the 699 model= cannon, forgiving, easy to hit
5 iron is the 639 CB= compact head, easy to hit, soft feel
6-PW 639 MB Plus= larger blade head, easy to hit.
and they sell most of these irons in both satin/chrome and black finishes.
Ben Hogans are sweet as well (havent hit them but i assume they are nice from a variety of forums)
it depends on what youre looking for....if I could do it over, i would get a set of 639 cb in 5-PW. they look that good. but I love the blades-classic look