is a1865 UNLOCKED iphone X will work in philippines or anywhere around the world
is a1865 unlocked will work in philippines or anywhere around the world or it would be safe if i will get A1901 model instead.
This explains the difference in detail.
The best thing you could possibly do is purchase your iPhone X in the country where it will be used. Otherwise, among other things, you will lose Apple's ability to service the iPhone in your home country, as well as the ability to use AppleCare should you choose to do so.