Nah, lower Vf of XHP50.2 will overdrive the cell more resulting in significantly more power. From djozz SST-40 has 3V at 2A while XHP50.2 has 3V at 4A (calculated down from 6V).
A tad higher efficacy won’t hurt either. At 1A SST-40 does about 500 lm while XHP50.2 about 550.