Both Xiaomi Mi 8 and Mi 8 SE are expected to launch in late August. Both of this phone has only a few changes to their specifications and with some hike in price. You can see the complete specifications here and choose the better one for you.
Xiaomi Mi 8 has a gyroscope sensor and supports Virtual Reality (VR). With VR you can play 360-degree simulation games, go on a roller coaster rides and watch amazing content that looks like real thing just in front of you. You can find complete specifications here: Xiaomi Mi 8 SE