The difference between the two fan bases is pretty simple.
McNeese fans are amused by U-S-L fans, we're not envious of them. That's the main difference.
Well, that and the fact that McNeese fans don't suffer from the same delusions of relevance that U-S-L fans suffer from. We're more concerned with the product on the field than we are with how many unsuspecting media outlets we can con into callling us something that we're not, or with wordsmithing our way around the intent of the legislature and the agreements we've made.
No, McNeese fans don't envy you.
We like to laugh at you and we definitely like to beat you, but envy never enters the picture.
The overwhelming sentiment that U-S-L fans get from McNeese fans is pretty basic: It's called pity.