Yeah, try it out, whatever's on sale.
As I said, it'll be different from Shogun II, mainly because factions don't share common units; a Dwarf army will have a completely different composition from a Vampire army, say. In some ways it's like Rome, where you'd have spear-loving Greeks and cav-loving Seluicids and Rome itself with its unique heavy infantry - only in this case it's Skavens with kamikaze ratmobs and Imperials with griffin knights and Vampire Pirates with undead Gundam suits that make cannon elephants look like Ashigaru spears. Even the campaign mechanics change depending on what faction you pick (Chaos, for example, is a roving horde faction that doesn't use settlements, while Bretonnia has weird global units caps based on farming and peasant vs noble units). But all the stuff integrates into the game very well (even the Skaven trashstacks), so if you find you hate a certain faction's quirks, you've got like twenty others you can try instead.