MusambaN1 achieved being voted to be part of an All Stars competition representing Europe. And it was not only spanish fanboys voting, he was very well considered by the community. That was quite huge back in the day, playing with the best european players as teammates such as SpawN, vilden, XeqtR and elemeNt.
With this I don't mean he was better or worse than fox. Foxj was a beast aswell in 1.6 times, much better than in CS:GO, same as MusambaN1. But if we compare achievements, I think it's unfair to use a team achievement were fox was lucky to stand-in for one of the best teams in CSGO who happens to speak portugueese, even if he played quite well in that tournament.