A water trampoline has a jump surface supported by a steel frame and trampoline springs and is generally larger. A water bouncer has a jump surface supported by a spring-less interlocking webbing connected from the floatation tube to the jump surface.  Water bouncers are normally smaller than water trampolines.

A water trampoline can support heavier loads on the jump surface and will provide
a higher jump than a water bouncer. All Island Hopper™ water trampolines are made of 1000 denier “reinforced” PVC material and are recommended for commercial
operations. Unlike the bouncer, a water trampoline requires assembling the framed jump surface. This will take about 30 minutes additional set-up time.