As a part of the Thrustmaster T-Series ecosystem, the T3PA and T3PA Pro pedals are compatible with a hugely customizable set of controllers. They can be purchased by themselves as an addon or come pre-packaged with certain other peripherals such as steering wheels and shifters.
Both sets of pedals can be adjusted for resistance and incline, and if you want heavy pedal resistance as felt in a real racing car you can install the included “Conical Brake Mod” (a metal bracket with a cone of rubber on the top that physically resists your applied pressure). There are a number of third-party mods for each set that can allow you to get a loadcell feeling.
The T3PA pedals are floor-mounted, while the T3PA Pro pedals can be quickly and easily flipped around for suspended (F1-style) movement.
What’s the difference between T3PA and T3PA Pro?
In terms of feel out of the box, not a lot. When pushed side by side they both felt exactly the same to me. The materials do differ, but I don’t think this makes a huge amount of difference in performance or reliability. The Pro set can also easily be flipped over and used (F1-style) suspended instead or (GT-style) floor-mounted.