In so many ways the two are vastly different, both as players and in terms of their personalities.
Fellaini regularly grabs the headlines with his performances and is a source of frequent controversy due to his on-field behaviour.
Neville, by contrast, is one of the less-vaunted members of David Moyes's squad, going about his business in a fashion that attracts far less attention.
Both are essential to the functioning of the team.
In fact, you could go as far to say that in his own way, Neville is just as important to Everton as his Belgian teammate.
Let's take a look at the reasons why.