I narrowed down my upgrade options to those 2 but can't decide which to get.
I've seen that the Zt3 is a bit sturdier than the Xt5 as it has some parts where the plastic seems flimsy but otherwise it makes it up by having a higher top speed than the Zt3 ( it's locked to 25km where I'm from )
Other than that they both seem like pretty solid scoots and since I mainly use it to go to work/light shopping they seem like pretty good options.