It's better than 2011 and, if Gronk is healthy, better than 2001,
The 2001 team gets romanticized (rightfully so) but that offensive skill group was below average at every spot and Brady wasn't GOAT Brady. They had a few stars on D, but even then Seymour hadn't become elite and Bruschi/Vrabel were really just in the beginning of their tenures as excellent players. That D was Law, Milloy and a bunch of up and comers mixed in with serviceable scrap heap veterans. Even McGinest was thought to be overrated (wasn't even a starter that year due to inconsistency and performance issues)
Winning 3 out of 4 made those guys icons and was possible because they ended up being good players but at the time, that was not a special team in terms of talent. This year's team has more offensive talent than 2001 had on D and I'd say this year's D is better than the 2001 offense (Trey Flowers, McCourty and Gilmore are all high end talent whereas 2001 offense had no true high end talent)