Hammerdin -> Magic dmg. ( only one kind of monsters that's immune to it - Wailing beast )
Windy -> Physical and cold dmg.....I don't need to show how many cold/physical immune you have in hell....
Windy has more pets/meat shields but need to be in closer range.
Windy has more life -> Oak sage
A cheap hammerdin can go easily thru hell....
A cheap Windy will have more trouble...
So to answer your question again on rushing/MFing.... i'd go for Hamdin unless you want to give yourself some challenge.
They both use pretty much same caster gear for MF :
Shako,Enigma, Chancie/Trang, Goldwrap/Arach/Tgod, WT/Trek, HOZ/SS/Rhyme/Splendor, Hoto/Wiz
But big different is in shield... HOZ give ton of Skills/resist, blocking to HDin.