I can only comment on taste since I grow neither. Dwarf Hawaiian all day long. It’s no contest in my humble opinion. DH has a much richer flavor and more character than RG. It’s got a unique spice to it that I haven’t tasted in other mangos. RG is just standard classic mango flavor. I couldn’t tell the difference between it and a Haden. If that’s your jam, then go with RG. Plus, DW is a cool looking mango that has a unique shape.