MGB is full of crap.
Ultimates = Crap
Comps = One of the Top sticks for fighters
Supers = Suckage, but better than Ultimates.
Supers feel like the stick has is loaded with clay, as they are very hard to move. They also have very poor diagonals... which means for fighters, you end up either not jumping when you want to jump... or jumping when you didnt intend it.
Supers also use those microswitches which have a thin metal leaf on them. These micros are notorious for problems. The leaf gets bent too easily, and if you try to bend it back, it warps and can ruin the internal mechanism in such a way that it never operates correctly again. The leafs metal is too thin, and gets out of whack too easily, too often.
Ultimates are a bit too sloppy, with a very long throw and is built in such a way that it wears itself down very quickly. The comps last much longer, are tighter in throw, have an improved system of durability and control. The only thing that wears is the spacer, which can be flipped over once, then eventually needs replacing. This could take many many years in a normal home use situation.. as in a non-stop arcade environment, they take like 1.5 yrs to +2yrs to kill off.
As for 4ways, any stick can play a 4way game. However, if there is no 4way diamond restrictor, its NOT a true 4way. It wont act, feel, or respond like a real 4way stick.
And of course, unless its a convertible stick... a 4way restricted stick wont play 8way games.
Personally, I recommend the Comps installed... and then add a separate dedicated 4way next to it (diagonally up to the left).