The main difference of course is that Morel is not providing any defensive value and seems unlikely to in the near future since Nico and Dansby have the MI covered for a while. When I checked the other day, Morel was only worth 1.2 fWAR. This doesn't invalidate your comparison of them as hitters of course, but that was the thing with Javy, even when he had stretches where he looked terrible at the plate, he could still provide value defensively.
Also one thing I've noticed about Morel is that yes he strikes out a lot, and yes he gets down 0-2 a lot by being aggressive early, but he's much better at turning ABs around than I remember Javy being. Several times over the past couple of weeks I've seen him go down 0-2 and then end up walking or at least getting to 3-2 and putting himself in a good position. He seems less likely to flail at a slider well off the plate when down 2 strikes. Yesterday he quickly went down 0-2, had a decent take on the 0-2 pitch and then got his mistake pitch and took advantage.