Michael and I own at Divi Little Bay and Divi Aruba Phoenix (so a different property than the one posted about here). We FAR prefer SXM to Aruba.
There is far more Caribbean flair in SXM than Aruba. Aruba feels more like Florida to us than the Caribbean.
High end restaurants in Aruba are in our opinion, just not as good as the high end restaurants in SXM (Grand Case)