People get so ridiculous in this stuff. Isco is 4 months younger than Saponara, and sure he was great at Malaga, but he's certainly stagnated while at Madrid and really hasn't looked that impressive for the last 18 months.
Contrary to this, Saponara is getting better and better each month and looks like a fantastic player now. So people are still acting as though Isco is some 20 year old superstar in the making. Saying Isco is 3X the player is ridiculous hyperbole.