Is this even a debate? Dexter is an active serial killer for like 20+ years with experience of killing killers, Joe would be an episode victim, joe has no experience and impulsive which makes him an easy target
Joe stalks people via their online presence; Dexter doesn't have one. Even Doakes, who broke the law to find out Dexter's history, couldn't do anything.
Dexter from the end of original sin is more than enough to hunt and capture Joe, for adult dexter this would just be a one off kill on a random episode in the middle of the season
You cannot compare these two. Joe would be one of Dexter's targets, and because Joe would be too caught up in his own bs with whatever love interest he's into he wouldn't see Dexter coming at all. The only possible way he would see Dexter as a threat is if Dexter posed any threat to Joe's current obsession 😂 but Dexter doesn't give AF about anything other than following the code and killing 😂