The ones with noticable free endplay will probably be needle roller types, ball bearings will tend to hold the crank more rigidly ( when testing for free movement by hand ).
These (needle roller) types need some form of thrust bearing added to take the pull of the prop ( if it's for aircraft applications). Making ball bearing types more suitable for aircraft.
The ball bearings will also be able to move slightly, (ie. axially in their housings when the alloy crankcase warms up), to compensate for differential expansion between crank and crankcase.