There is a lot of overlap on the UL and standard versions, lately I have found myself trying to fly in lighter conditions and if the standard cannot be kept in the air, I guess you have no other choice, unless you start changing spars, which would unbalance the kite, other than to go for the UL. I even looked at ordering a UL and a vented version. UL ideal 1-15 mph, and vented 8-25mph. Still some overlap, but I imagine both kites probably fly well in the middle of the wind range, UL 7mph. Vented about 15 mph.
sometimes kite flying is like collecting models, it’s nice to have this or that version.