There are plenty comparing Pochettino and Mourinho. And the most common comparison is that Mourinho is past his sell by date and a tactical dinosaur while Pochettino is 'progressive'.
I've seen this comparison done so many times and have been completely bewildered by it because Pochettino and Mourinho are very similar in their tactical approaches. Both utilize a midfield to break up the game (generally two defensive minded midfielders, one dedicated as a DM, and one box to box powerhouse). They both utilize a traditional striker (Pochettino even went after Llorente, which signals what qualities he wants from his strikers). They even use the same formation combinations, 4-2-3-1 and 3-4-1-2.
The main difference between the two is their use of fullbacks, and even then that's debateable. Valenica and Young are both refashioned wingers, Young especially is a very attacking fullback.
Managers like Guardiola, Sarri, Tuchel are progressive managers, they focus on positional play and micro manage the players movements. I have no idea why Pochettino gets bundled into this group, he is a good classical manager.