Like others said, the Ima is smaller. I've thrown both and the both get bit, but it hasn't worked for me in any other situations than traditional lipless fishing. From my experience, the fishing conditions have to be pretty easy, 50 plus water temp, crank and stop seems to be the best from my experience. Trying to get sneaky and get more complicated with retrieve and cadence variables, doesn't seem to produce better results. Just simple cranks and brief pauses, and they usually smash it pretty hard on the pause.
There's tons of hardbaits that will be just as or more effective in those conditions. For me personally, it hasn't worked in minus 50 / colder water, which is what would make it a useful new tool.
The Ima is a little more subtle and does seem to work in a little colder water than the quake 80.
Again, for me, I'll be excited if they ever evolve the tech to make smaller/thinner/tighter wobbling suspending liplesses.
Years ago, I grabbed a MB Fermata. The action of that was pretty killer......nice tighter wobble. I lost it before I had much time on the water.