Reason: https://inkbunny.net/Argento = http://www.furaffinity.net/user/sonicboom53/

Bumping this.

Another bump. Still seeing posts with both names.

According to this, yes, they are the same person. However, I would recommend flipping it around, as most of their profiles use SonicBoom53.

Edit: Just to be on the safe side, I sent him a PM. Thankfully, for once, the artist knows English so I'll be able to get a fluent response.