Almost all the hog in the us are just the garden variety feral hogs. If you are a trophy hunter and looking for a wall trophy there are hunting ranches the have true Russian boars but it will cost you a shiny pinny to hunt those.
As to taste. Hogs are armnevores (spelling, they eat plants and meat) and eat any thing from farm land grain to other dead animals even themselves. Some say the small one eat best as a rule this is true but if you were to kill a 275 lb bore that has lived on flat ground and eaten farmers corn and grain all its life you would have a very good tasting hog, by contrast you could kill a 125lb sow that lives in steep mountains and eats trash and dead animals and she will be tuff and nasty tasting.
The pigs I like to shoot are from 100 to 150 pounds, why, because i can drag them myself to the closest road. Its just me and the wife at home and i dont need a huge hog. With that said i will take the first shot opportunity i get.
One more thing it doesn't much matter what kind, they are just plain fun to hunt, i love it.
Where do you plan on going. Texas has the most. California is very good to but it will cost you. We like our hogs here, i think an out of state hog tag is 68$ and change for one tag and you would hunt a privet ranch, the going rate is 500 (simi to non guided) to a 1000 for a fully guided.