Modric is not a generational talent, he is a great midfielder that comes around every 7 years or so. He is in the Schweinsteiger tier except Schweinsteiger was more injury prone and only played for a great team for a short period under Heynckes.
Look no further than every single Clasico we played against peak Madrid. Even with a declined Barca midfield with the likes of Paulinho in it we never got outplayed by Modric and Kroos midfield. If anything, Rakitic came out on top between the 2 Croatian midfielders almost every time they faced each other. Was also better at the World Cup except 1 game against Argentina but the 3peat hype wave carried him to the Ballon d'Or, so what can you do?
And now look at the midfield domination from Barca against Real in 5-0, 6-2, 3-1 (in Pep's last season) or 2-0 in Bernabeu (09/10, Xavi masterclass deciding the title race). The Barca domination led to freaking Real Madrid, record CL holders, camping a Boeing 747 in their own home stadium with something absurd like 10 defenders on the pitch and Özil false 9 and Di Maria, Benzema, Higuain all on the bench at some point.
Xavi and Modric are more than 1 tier apart. Xavi was not only better at controlling a game, he also had end product that you only see from elite #10s like Messi. I think he still holds the record of most chances created in a World Cup since Cruyff. Madness that anyone would put Modric and Xavi in the same tier and more so coming from a Barca fan who must have followed both players' careers closer than other casual fans which would be more excuseable if they held such opinions.