I think the S10e is the better option when compared with the S10. The S10+ is a different matter.
It will be interesting to see what happens next year (really premature, but yea) because I suspect the S10e will cannibalise sales of the S10.
With that said, I prefer some of the features of the S10e, with a flat display in particular. The lower resolution, everyone seems to comment that it's no worse, and I think it's a bit of a plus that it's lower resolution. Battery life is helped, so it outlasts the S10. Apart from the location of the fingerprint reader, that it's in the power button, I think it's better. I like the scroll down feature for notifications, but that's each to their own.
The only feature that I think is remotely useful is the telephoto camera. Apart from that, the only real differentiation is the size.