Flash Media Server vs XMLSocket Custom made Server

What do you guys think is best? I have yet to meet someone who has done any sort tests.

I heard recently that FMS does clustering, which is nice, but I know that a Custom made server ‘could’ do clustering if made to do that…

Obviously a custom made server means a lot of brain power, and another language, but that’s fine for me, as long as it means as fast as, or faster than FMS.

However if I’m doing all this trouble, just to find out that FMS can do more than what I’m doing, and faster, then I’m just wasting time.

Please anyone?!