I don't think Holmgren was all that much better if at all. MM managed Favre pretty well too, the offense has rarely been an issue. Holmgren was as conservative as they come, I can't believe people would forget that. Defensively we were better. How could we not have been. Reggie White alone makes the gap large. Gilbert, Santana, Sean Jones, Koonce and Simmons? Both better than Ryan and Blake. We were good on DB's when we had Williams and WOodsons and Shields was probably better than Newsome and Evans, but Butler and Robinson were better than the Safeties we have now. and Fritz was a heck of a defensive coach too. a lot of people don't rememberr, but a lot of players were relieved when Holmgren was gone and let's not act like there weren't a lot of disappointments when he was here. All those Dallas games where they were better and we just coldn't get them, fine I get it, but then we were better than Denver in every way and lost in that super bowl.
I think they're both fine coaches. I think a lot of people's present day disappointments are clouding their judgements