The impact screen is the part that takes a beating. Here is what actually matters.
Bounce-back
Cheap screens throw the ball back at you. Better screens soak up energy. Check the maker's guidance on minimum distance from ball to screen.
Noise
Tighter weaves and quality material cut the slap sound. Matters a lot if the garage shares a wall with a bedroom.
Image quality
A smoother, brighter surface gives a sharper projector image. Pick the screen size to match your enclosure opening, not the other way around.
Mounting
Bungee or grommet mounting lets the screen flex on impact. Rigid mounting wears it out faster.