What is the difference between BSS84PH6327XTSA1 and BSS84PWH6327XTSA1? Would the one with the W be a good cross for the other part?
The W in the part number actually changes the physical size of the part.
BSS84PH6327XTSA1 (DigiKey # BSS84PH6327XTSA1-ND) is an SOT-23 package.
BSS84PWH6327XTSA1 (Digi-Key # BSS84PWH6327XTSA1CT-ND) is an SOT-323 package.
So these will be different sizes and would not have a matching pad layout.