There are now 3 evolution (egg) hoppers. The first had an angled feedneck, the second had a straight feedneck and z board option. The third had all the features of the second, plus an upgraded and strengthened pair of shells.
As far as capacity, i think with the guide tray fitted they hold 160, and without the guide tray it's more like 175-180.
The bps is around 13-17 for the x boarded evo 2, and 17 - 20 for the z boarded version.