Ok if you still dont understand what I'm saying, I'll try to be as clear as possible.
First you spoke of adjusting to MLS, reminding us of Ontivero. To that I answered that Ontivero's flaw, maybe you forgot, was his fitness. We knew this before he got here and he confirmed it to us. The guy can absolutely not play 90 minutes, never has. Vargas is capable of playing 90 minutes in a more athletic than skillfull league, like the chilean league. He never had a reputation of having fitness problems. I also pointed out that Vargas and Ontiver are incoparable as to their strenght. Vargas is much more brawny and strong on the ball than Ontivero.
Then you spoke of their potential and how they were both hyped at a young age. To that I answered that Ontivero never went beyond the hype. Ontivero never performed well against men at a pro level. Vargas showed he can perform against men at a pro level in his first full pro year.
Now you're focusing on the mental side, but the two points above already show their differences on the mental side. Another thing is that Vargas has had issues OFF the pitch. I never heard of Ontivero having issues off the pitch, but I remember him getting frustrated on the pitch though. So I dont even see why your trying to compare both mentally.
So what I'm getting to is that they have diffferent qualities, different issues and the only similarity they have is that they're both short skillfull SA wingers, and thats a very superficial comparison.