User blog comment:RoznosicielCiast/Is Siphoning Strike too strong?/@comment-5686533-20131105105303/@comment-6061249-20131105123816

Some similiar mechanism, but not enough farmable. will get 3/6 stacks per kill + huge profits from lifesteal, while gets only 1/2 per kill plus higher mana cost which reduces stacking for first minutes of the match.

Also, is able to spam it in fight more often because he is durable and in fact should force fights, while  is made for  bursting down APC's or enough unaware remaining squishies. Of course i do not deny 's evil powers, but if i had to choose one for a 1 hour long game, seems to be more universal and just better.