Hi John, the term 'better' doesn't mean much, unless you say what for. Eg, it's no good for most ship models, it's not much use for large heavy planing hulls.
You must have realised that the 850 is not well thought of from the replies, so let's move on from there.
No responsible person is going to tell you to go for that brushless motor unless they understand what it is going to be used in, and what you expect from it, there may be better options and possibly much less expensive ones.
Example, my 1 meter long RTTL, performs extremely well with a 2826 1400 turnigy motor on 9.6 volts. But, it is unusually light weight, and my expectations mean that I want performance a little over scale speed, not silly fast. If I put the same motor in my old aerokits crash tender, a smaller but heavier model it wouldn't be as good..
Be specific mate, we're trying to help you.
Chas
Edit. If it's all the numbers used for these things that bother you, just say so, we've all been there so we'll cut through all that to try and help.