Don't get too wound up about comparing scenarios with Lauda. to support what ifs.
Lauda and a couple of others were in a climb condition and the ability to control sudden roll was affected by the unwanted reverser efflux over the wing.
At lower speeds associated with V1 the effect on control should be less and it's more akin to an engine out symptomatically.
I would much prefer the average pilot to perform by rote at V1 unless they have been specifically trained otherwise