PVP question - simultaneous deaths

I was playing last night and my Ranger ended up killing their Warlock, but then dying to the Reflect Damage, so we both died. I got a chest from the fight. I am wondering if the other person did as well, or if the fact that the Warlock died first means I technically won (the best kind of winning)? Would also be relevant for the Wizard’s legendary wondrous item.

First to die losses, unless it was wizard with exploding ability