loop straps are great -- you can leave each strap in place exactly where you want it secured. If you use a light colored strap, you can even mark in a sharpee (like FRAME A- FRAME B ETC) as to avoid any confusion
the issue I can think of is that loop straps have one additional stitching area, so in theory there are 2x as many stitch points that could fail. Also it requires a bit more strap fabric to make the straps.
so more expensive. But in reality the extra weight, cost, and very miniscule added risk is probably worth the cost.
Use a good quality strap and be sure to secure diagonally so your frame can't slide around on the boat ...
also the straps will dangle on the frame if you leave them in place during transport so you may want to transfer the straps from the boat to your trailer frame to secure the frame during transport if you deflate your boat to transport ...
Hey, if you want me to take a dump in a box and mark it "guaranteed", I will. I got spare time.