open ended ones tend to be lighter and with longer threaded part for nut of similar height, and also more universal regarding compatible stud length, as allows long studs to go through.
closed ended ones prevent dust buildup, lessen rust and such.
For tracked car with frequent wheel changes i'd probably get open ended ones, for mostly daily driven car - closed ended ones .. or wait, keep using OE lugnuts which are such and you get free set of with car
