I have both frame dump and quater frame dump i love the quaterframe it feels more stable than my frame dump. The frame is a 28 ft and the q- frame is 32 feet
and high sides. My opinion is. framedump pros: stable and usally built alot stouter than other types. also you can use them in rougher tarrrain.
Con: if you flip one your truck is going over also.
Quater frame pro: Stable has more points connecting to the box, All wheels dumping on the ground, can manuver in tighter areas after you dump.
and if your driver flips one it wont take the truck with it.
Cons: More moving parts
Frameless trailer i hate them and wont recomend them to anyone. But this is all my opinion. I haul all types of material like gravel,dirt ,boulders, green waste, asphalt, mud and demo and scrap steel. So i hope this helps you