I've used just about everything on Tron at one time or another, and NOTHING works like a Tron stick.
As mentioned, the sticks are 8-way sticks, but are lightly restricted, so that if you push them QUICKLY to a direction, you don't get the zig-zags on the lightcycle stage.
Using a TRUE 4-way limits you on the other stages though, as the Tron sticks will let you hit the diagonals, they are just very insensitive to them.
There is a little sweet spot between each TRUE direction where the stick will do the diagonal.
As a workaround, you really need either a 4/8-way top switchable stick, or a 4-way and 8-way wired to the same inputs.