Got 2 5012 for my reeftank, very similar measures. They'll grow anything if the water quality and parameters are right. 2 XR15 s wont give you the "blanket of light" that 2 5012 will provide. regarding app vs remote, yes, app is easier and more convenient but the schedule is not something that you will change that much. and you always have the manual program on the 5012 to mess around with colours or to try out different combinations.
I would get 2 5012, even though they have rise in price they are still a better value in my opinion. There is a guy on instagram that has developed a chip for the whole range of evergrows and apparently is fantastic. total control of the lamp for 40 quid.
