Unless you're looking at them as a squad, competing on multiple fronts over a gruelling season, that comparison doesn't work. We can switch out more players than they can whilst maintaining a certain standard, there's no way they can do the same.
Alderweireld, Wanayama, Ericksen, Alli and Kane make up their proper spine and none of them can afford to be missing or have an off day. We've not got the same reliance on core players to come out the other end with a result, even if what we do to acquire those pts isn't the prettiest (as attested to in the absence of Pogba.)
They've the first xi, but they don't have a better squad. They are ill-equipped to go deep in the CL whilst battling in the league - one will invariably derail the other even if they try to focus on both campaigns at once.