Not really. While some of the software UI looks similar. The hardware is pretty unique. Have you ever held a Xiaomi before? I own both a Mi 2s and Mi 3; the hardware and software experience is really quite different from Apple. (And most of the rest of the Android ecosystem for that matter.) The "copycat" claims are overblown.
I think people think of the Mi4 when they talk about an Apple rip-off.