Which one is better?

[RC51TOFUMAN]

Overall, it's probably the best retractable cover because:
1. Aluminum slats are interconnected (by metal) and are not connected by rubber. And, slat seams are sealed beneath the cover.
2. The top surface of the aluminum has a texture that will hide scratches.
3. Small canister, only 8" x 8".
4. Curtain is double-walled aluminum (So is the RetraxPro, Pace Edwards full metal is not).

One con though is that the cover requires 4 drain tubes (2 in front, 2 at the rear) instead of the typical two in the front.

very nice looking cover