Having just ascended Joon I have noticed that I use both frequently but the decision matrix for me is this:
Is there someone on the other team I need to snipe or take out very quickly? (Eg. Alby, Finley, Kage) - if so then Joon is obviously much better for that purpose. I don’t have his costume but even more so costumed
But if I have a bit more time up my sleeve I use Drake.
On that basis I think Joon could actually be a bit better offensively. Drake is a better all-rounder I suppose.