Yeah Haruman, you're right that the Fight and Brawl Pads have different positions for RT/RB/LT/LB, which is actually kinda strange. Naturally, for purposes of this thread it doesn't matter, since we can arrange our buttons however we want.
Speaking of arranging buttons, I'm trying to decide how I should arrange the 8 buttons for my 360 cabinet. I've seen at least 4 different 8-button layouts for 360 controls, but only two layouts are common:
B X Y LB
A LT RT RB
Examples: Mad Catz Arcade FightStick TE, Street Fighter x Sanrio Arcade FightStick PRO, Razer Atrox Arcade Stick
This layout seems the most common, and it is also consistent with most of the 6-button layouts I've seen.
X Y RB LB
A B RT LT
Examples: Madcatz Official Super Street Fighter IV TE Fight Stick, HORI Real Arcade Pro.V Kai Fighting Stick
This layout seems a little less common, but it keeps the four color buttons in the original positions.
(Note: The Mad Catz FightPad uses the leftmost 6 buttons of this layout)
What layout do you folks use for your custom sticks?
For emulators and most AAA fighting games (SF4, Tekken 6, etc.) the button mapping is completely configurable, so for those games it doesn't matter which layout I choose. Some games offer semi-configurable button mapping where you can't map buttons individually but you can choose between two or three pre-defined mapping sets. In those cases I've noticed that Layout #1 (or its 6-button equivalent) is usually one of the available options. However, layout #2 is theoretically more consistent with the rest of the 360 library since the four regular buttons (A, B, X, Y) keep the same relative positions as the standard controller.
In my case I'm going to identify the handful of games that I care about that don't have fully-configurable button mapping and determine how playable they would be in the different layouts, but I'm curious to know what the layout hackers/modders here have chosen.
[Edit1] Looks like Project echo uses this for 6-button layout (plus start and select as the right-most buttons), which is different from either of the ones I'm considering:
X Y RB
A B LB