d_t_a
(d_t_a)
50
From afar, basically the differences are not big, considering they have similar-sized reflector/heads. The Sofirn SP31v2.0 is a bit brighter (confirmed when I use a basic lux meter and do a ceiling bounce test at the same distance).
For instance, using a fully-charge battery, and doing the same ceiling bounce tests, I get these lux readings:
Sofirn SP31 v2.0 (XPL-Hi) : 115 lux
Convoy S2+ XPL-Hi NW (7135x8) : 90 lux
Convoy S2+ SST20-4000K (7135x8) : 60 lux
(lux readings when on max brightness, at the start)