They're identical. The D-Pad/POV hat on the new sticks actually hooks up to an analog channel.
On the old sticks, you have:
- p?_x
- p?_y
- p?_wheel
- p?_sw_top
- p?_sw_trig
Everything else is wide open. (Just don't screw up you're sticks to badly, as they're hard to replace.)