Global (Multilanguage + Google Apps) applied over original In this version, you are receiving Asian specific item with applied Global rom on it. Depending on the device, it'll be not having difference between Native Global variant and variant with Global rom installed (except 4G, 5G bands), but on some devices you may be unable to use ex. financial applications that requires device to be locked (ex. Xiaomi)
Global (Multilanguage + Google Apps) no OTA- the same as one mentioned upper, but it'll lack OTA update functionality (Update Over the Air)
Chinese (English + Chinese languages, possible Google Apps) This is pure Asian version of the device, contains 2 languages only, may contain some 3rd party Chinese apps that can be un-installed after. In most of the scenarios, you can install Google Apps on it without any problem. In some scenarios, installation is possible but not easy (ex. Huawei)
Original China Multilanguage (possible Google Apps) This is pure Asian version of the device, contains some international languages to choose unlocked by producer.  In most of the scenarios, you can install Google Apps on it without any problem.
Global NATIVE version This is Global installed by device producer version, will have many languages (it depends on the device how many) and should have natively installed Google Apps. B