Its not disingenuous to say that, it just is what it is. Their seasons are 2 years apart in age, EP's rookie season he had a year longer to develop basically. Development also isnt linear, so EP has something to prove still before we can say anything about him being the better player, let alone being in a different tier because based on last season and the start of this season, Larkin is the better player.
I dont really doubt EP will likely be better offensively overall, but with Larkin looking like a point per game player on a bad team, possibly higher when the D improves, EP is going to have to score 90+ to be equal to him realistically. I think he can likely get there, he has a tonne of skill. But its also not some guarantee that he does that just because he had a really good 60 something point rookie season either. To be in a different tier, he'll have to be in that 100 point range. Hes good but thats not some number every dynamic offensive player in the league automatically hits either (its also something EP has the skill to do, but he needs to prove it before we start saying hes that guy and tiers ahead of people who are also really good players)