skill charge VS attack charge

[Ghizguth]

Hello!

I've read on other forums that skill charge as a trait is better than attack charge, since skill charge, supposedly, improves not only the damage of skills but also the basic attack.

However, I haven't been able to replicate such findings in game: I've crafted two basic staffs for Ryza, but almost identical ones except for the fact that one had skill charge lv -15. I used them both on the same enemy (the puni boss in fairy forest, I needed his loot). Yet the damage output from both staffs was similar, despite a huge deviation (ie. ranges in damage from 10 to 38 damage). But again, this disparity was found for both of them so...

Has anyone definitive proof on this subject?

EDIT: did the test again, but with skill charge+ on top of it, and does seem to improve basic damage attack, as I've seen higher numbers (40+) and nothing lower than a 17 on the other end. So it seems to be accurate...? Would still like more proof/data if anyone has some.