[nativepaul]

Assumeing the 2 boats weigh the same have the same power and the same sharpness of edges, a hydro has the highest speed then cat then monos.

A shallow V mono submerged drive mono turns the best followed by a cat, then a deepV mono then a hydro.

I prefer cats myself they are nearly as fast as hydros (I've placed in hydro races with one of my cats), turn as well as I want to turn, and handle water nearly as rough as a deep V,

You can make a good deep V turn as well as a cat with big turn fins but that will increase the speed difference between them.

The biggest advantage to a deep V is you can make them self righting, and I haven't found a way to get a cat back on its feet.

Here's my little cat 18" long, 400 size Mega 16/15/3 BL motor (watercooled), 30 amp Hyperion plane ESC (watercooled), 3s2p 10C Tanic 1550s totaling 3100mah, .098" flexshaft, plastic octura X431 cut down to 28mm, nothing gets much over blood temp. Video