What’s this GB 64 or 128 ? What does that mean can you store more photos with more GB ?
You have answered your own question, yes the more GB the more photos/video you can store.
I think its still worth remembering the 10(x) is still a 5 year+ old phone that you would be buying of someone you don’t know (different scenario if got it from a family member) it will be at or near the end of recieving IOS updates.