Aluminium rear hubs - old or new version ?

[Oops]

Hi,

I'd like to buy the aluminium 0° rear Hubs for my RB6.
I've the choice between the old version and the new one with plastic sleeves.

Almost the same price but the new hubs are not comming with bearings.

What could be the difference between the old ones with bigger bearings and the new ones with plastic sleeves and kit bearings ?

wich one is better ?

Thanks