Wawrinka’s slam wins were very much comparible to Murray’s. 2014 AO Stan faced a crippled Nadal in the final, and his first three rounds were Golubev, Falla, Walkover. His win vs Djokovic was very impressive, and Berdych is a hurdle to be sure, but Murray’s 2012 US open draw was Federer, Berdych, Djokovic in the final 3 rounds, with Raonic in R4 , so I don’t see how (Raonic), Federer, Berdych, Djokovic is 1000x easier than Djokovic, Berdych, injured Nadal?
2016 Wimbledon compared to 2016 US open, we have Tsonga, Berdych, Raonic for Murray vs Del Potro, Nishikori, Djokovic for Wawrinka. Tsonga and Berdych both have similar credentials to Nishikori and Delpo when he’s playing well is great and he was getting back into good form at the time so he’s similar difficulty to them as well, probably a step above. Raonic is a meh slam finalist but he was playing well that tournament, Djokovic is one of the greatest players of all time but was playing like trash compared to his usual self, and only made it to the final in my opinion because of the easiest US open draw of all time, including 3 walkovers/retirements, Janowicz who was on a protected ranking and Monfils who he has never lost to in his entire career. So they aren’t that different.
2013 Wimbledon vs 2015 French Open: fair enough, FO was a tougher draw for sure, Janowicz as a SF opponent is a bit of a gift, but Murray still beat a good Djokovic in the final, once again not 1000x easier.