i'll reply here.
I would always go for the 31/30/30/31/31/31 IV one because that one maximises speed. Unless you want a slower variant to get slower u-turns/volt switches off, there is no real reason to not have max speed IVs on zapdos
I would always go for the 31/30/30/31/31/31 IV one because that one maximises speed. Unless you want a slower variant to get slower u-turns/volt switches off, there is no real reason to not have max speed IVs on zapdos