I am looking at rubber-band effects and came across "Pinnacle" by Russ Niedzwiecki, and Band-it by Kris Nevling. Both seem to be nice, impromptu effects, which seem almost identical.

Does anyone have an opinion on which is better?

They are not exactly alike, both nice in my opinion. Kris took a lot of heat when his routine came out as it seems composed of uncredited moves developed by others (Russ among them). He would not be the first so I do not have an opinion. One point, the "convincers" shown at the end of the pinnacle demo are not impromptu and can not always be done with a borrowed ring (although they look amazing)