(I have a 3" happs and a 2 1/4" wico TBs. According to theRealBobRoberts, the happs 3" and 2 1/4" are basically the same thing except at a different size. I do not have a happs 2 1/4". With this in mind...)
I think the happs TB will be a slightly higher quality TB, but no where near 3x better than the wico/suzo/ultimarc TB as the prices indicate.
The happs has three full size rollers w/ 2 bearings each; the wico has two rollers w/ 2 bearings each, but for the third the ball rests directly on a single bearing w/ spring support. From this and the fact my wico doesn't roll for very long, I'm pretty sure the happs 2 1/4" will free spin a lot longer than the wico.
The ball in my wico fells a little "looser" than the one in my happs, but at least some of that has to be because of the heavier 3" ball in my happs. [shrug]
The wico has a smaller footprint according to happs dimentions, but OTOH is a little deeper. Both have approx the same amount of ball showing above the panel top.
I like my wico 2 1/4" TB, except I find the 3 inchers much more my size.
IMO, do not get the way too expensive 2 1/4 happs. Either get a 2 1/4" wico/suzo/ultimarc, or a 3" TB (happs, betson, or wico are all fine), especially since the betson and wico 3 inchers are less than the happs 2 1/4", and the happs 3" sometimes is on sale close to the betson prices.