Currently i have a tub of AOS Lavender shave cream and a bowl of DR Harris Arlington Soap.
I use and love both and I can't really find an advantage to one over the other.
Creams may be a bit easier to lather than soaps and require a little less water to get right.
Some straight users say soaps work better for straights.
I'll use creams for a while, then use soaps exclusively for a couple months. its really a personal preference thing.
YMMV and all that.