We are comparing L2Off and L2J... not Java and C++
Everyone knows that c++ > java
Do you still think that L2OFF = Official Server files??? Well yes, maybe this is true, but only for c4... that were the last seen leak files... everything after that is developed by some developers that are A LOT less than l2j devs. So, Interlude, Kamael, HB, Gracia pt1, Gracia pt2, Gracia Final L2OFF has nothing to do with the official files (maybe the only thing is that they are codded on the same lang) i mean L2OFF is not 100% retail like... is as retail like as L2J!
L2OFF might've been more stable than L2J on the early versions (c5, interlude) but only because it used Official Server files, that have been created by PROFFESSIONAL DEVELOPERS. L2OFF became unstable due its development by non-professional developers.
So, as i said L2Off > L2J on c4,c5,interlude, BUT L2J > L2OFF on gracia