Juventus on the other hand might arguably have a better defence, but on the whole the Higuain and Dybala factor i comfortably offset by having Lukaku, Pogba and Mkhitaryan. And they play Mandzukic on the left wing, even if that has proved to be a successful experiment, i can't put that starting 11 above United's.
I think that a team's worth has to be judged on results, and as far as they go our starting 11 is a CL 2017 finalist, thus last season's second best in Europe. Without offence, but you still have a lot to demonstrate before saying your team is better.
In any case, in the first two games of the new season our starting 11 has been
---------------------------Buffon-------------------------
-------Lichsteiner----Rugani----Chiellini----Alex Sandro----
------------------Khedira----------Pjanic-------------------
-------Cuadrado-------- Dybala----------Mandzukic------
--------------------------Higuain-----------------------------
And most importantly, this is an 11 built with only our SUBS
--------------------------Szczesny-------------------------
----Howedes-------Barzagli------Benatia------Asamoah---
------------Sturaro------Marchisio--------Matuidi----------
-----Bernardeschi---------Pjaca-----------Douglas Costa--
I honestly think we have one of the deepest teams in Europe, this second 11 would beat most teams in Europe.
As to Mandzukic, he's been our MVP of the season, that move has proved to be way more than successful, and this is why he's the only player that never gets subbed, never. Our wings are very atypical, on paper they might seem underwhelming but in our system they are deadly; it works perfectly and this is what matters.