Assuming Perez doesn't fall back in a big way, the similarity is that they were both guys who started as pros very young, had decent bat to ball skill but no power. Paredes found his in a big way, Perez has upped his EV 4 mph and is hitting the ball more in the air this this season. His BaBIP is right where it was last season but he's slugging at a higher rate. The differences are that Isaac's bat actually started coming around at 23, Perez is 25. OTOH, Perez is more athletic, should be a better OF than Isaac an IF. Also my by my personal theory, the younger a guy gets good, the longer he likely to stay good on the other end, so Paredes has that over Perez as well.
I remember discussion that some in the org didn't trust Paredes body conformation - thought he was going to run to fat - they were wrong about that- he still looks the same as he ever did.