I could be wrong, but didn't previous generation of Samsung A series phones come with eMMC storage. I think this has UFS 2.2, so slight increase there as well.
But I agree that overall it's an incremental upgrade only. And base model of 4GB RAM might not hold in the long term. I had/have an entry level Samsung phone(A05 I guess), but that stutters much
They are a major force in the Chinese market so maybe it might see some traction there, but otherwise, I still don't see a third mobile OS getting genuine market share.