Just go with the Imagine. It will have the same performance of those 2 guns, but it's cheaper. With the money you save, you could spend money on a better hopper (if you don't have an electronic hopper, you will need one or you will chop on any electronic gun without eyes), paint, feild fees, or upgrades.
OK, but why pay more money for the same gun? Pretty much the only differences between e-spyders are looks and the types of displays they have...nothing performance. Imagines usually go for 100-110, with the $40+ you save, you could use that towards upgrades for the imagine, paint or field fees, or gear.