They look like very similar hacks to me. Shell, scratch (if necessary), and solder. The holes on the madcatz boards are nice, but on one of mine, I still went and soldered right to the contacts on the board.
The only big diff I see is that the madcatz has 6-buttons so you can skip any issue soldering to the shoulder triggers. But I don't think there's much of an issue there anyway.
I say hack what you have on hand.
-pmc