Both of your choices are good ones and I doubt you will find anything better. I am fortunate enough to have acquired a model that, IMO, is the best combo plane ever produced this size; the Global Freestyle. However it is no longer available. I have one and just bought a backup off a fellow club member (nib-he is doing some serious pattern stuff now).

I was looking at an alternative and these 2 planes were my choices. I don't know how much the Twister weight, but my Global Freestyle weighed a little over 6lbs (with about 600+ sq in of wing area) and the ys 63 pulled it with authority (vertical was not an issue). In fact I believe the extra pound of weight contributed to the excellent pattern flying capabilities it has.

I don't think you can go wrong with either of these planes. Good luck...