I'm not sure, but I don't think any braces are offering "patella support". You will get real good "protection" but not support. Maybe you can find an elastic knee supporter that will hold the patella stable for wearing under your braces. If nothing else, you can go to a pharmacy and get some orthopedic socks. Those puppies are tough to get on and support your whole leg including the patella. Again, for under your braces.
I happen to think the RS6's work well to help keep you from getting injured, but since you have been injured, maybe you should look at the Asterisk's.
BTW....get BOTH braces!