I’ll ignore the A line phone and focus on the two better options depending on your use case.

Get the S10e: If you want water resistance, stereo speakers, a compact build even at the expense of battery, better cameras, wireless charging. It’s pretty much the flagship Galaxy S10 with all the features but in a small form. Also if you want a headphone jack.

Get the S10 Lite: if you don’t care about the things above and just want a large screen, good battery and the most powerful performance from a Snapdragon chip. It’s more of a phone to compete with something like a OnePlus 7T - it focuses on performance, size and battery over cameras and the other “flagship” features.

There's no SD card slot in the 5G model, just so you know. And I bought one and tried to use it on T-mobile but T-mobile told me that its a phone that's not supported on their network, for what it's worth. I ended up getting the S10+.