Every Unknown frame I've ever seen has been a piece of garbage. If you're talking about the 2015 version of the Leader 725, those are garbage too (go back to page 387 of this thread if you want to see why I feel that way).

There are enough aluminum frames on the market to rule those two choices out. If you want a frame having aero tubing and a normally-proportioned top tube, get an Aventon Mataro.