Point is that they are a year ahead down the line of development and that's all. They're not ahead of us because they have a better squad. The only area where they're better than us is dealing with dross and that is down to coaching. It's a real possibility that Pocchettino might just be a better coach than Klopp, time will tell.
I think it is because they have a better squad. Let's compare how many appearances each first choice player has made for each team in the league this season;
Spurs Lloris (28), Walker (29), Alderweireld (24), Vertonghen (27), Rose (18), Dier (30), Wanyama (30), Dembele (24), Alli (31), Eriksen (31), Kane (24)
Liverpool Mignolet (24), Clyne (33), Lovren (25), Matip (25), Milner (32), Henderson (24), Wijnaldum (32), Lallana (27), Coutinho (27), Mane (27), Firmino (32)
The idea Pochettino has somehow constructed a team of robots that evade injury and play almost every game is just not borne out by facts at all. People on here like to bemoan our luck with injuries but it's certainly no worse than Spurs have had to deal with. If anything, we've been extremely fortunate. 4 of our best XI have played 30 matches and Mignolet would likely have done so too if he was not dropped for a while.