Both have there individual positives and negatives -
Hesalite - Minutely more faithful to the original though arguably at this point it feels like this is not a swaying argument. I do like the warmth of the dial under the hesalite and as much as I would like the sapphire case back there was not enough of a pull to make me choose the sapphire. Scratches are an issue but as many have stated, Polywatch will keep this from being an issue.
Sapphire - Honestly, the pull for me with this version had nothing to do with the case back or durability of sapphire, it was the applied logo. I really like the look of the applied logo versus printed. Additionally, the bracelet's polished center links give it a bit more depth visually.
For me the pull of the applied logo did not justify spending the extra $. That said, I feel like either one is an excellent choice.