I wouldn’t actually say its fair to compare the miniz and hpi micro rs4 because miniz is 1:24 and the micro rs4 is 1:18 and is 4wd but the miniz is2wd plus the mini z comes ready to run except for batteries but the hpi micro rs4 is not ready to run it is more like a real 1:10th scale car you have to buy all of the electronics seperate and you have to paint the body. But I think you can buy the hpi micro rs4 ready to run i don’t know. Also the hpi is faster but that is because it can take more cells than the mini z and faster motor. Also you can use the hpi micro on your 1:10th scale tracks but the mini-z is best on carpet.