It sounds like your feelings regarding comparing MGM and FGM stem from the different attitudes your female friend and your dh have towards their respective circumcisions.
I think those attitudes are cultural. If your friend is now in a Western society (which it sounds like she is), then she is getting the message loud and clear that what was done to her was wrong, took away her sexuality, was a horrendous mutilation, etc.
In nations where FGM is performed and accepted - if you talk to victims of FGM, they will give you lots and lots of reasons why they are GLAD they are circumcised (cleaner, healthier, etc, etc). They are in a culture which accepts FGM, so they accept it.
That's what's going on for your husband, I would guess - he's in a culture which accepts MGM as 'normal'.

So he accepts it as 'normal' - after all, most (if not all) of his friends are circumcised, and they all say they're OK as well.
Whereas your friend is surrounded by uncircumcised women - who feel sorry for her.
I'm pretty sure that a generation from now, when MGM is regarded in the States in the same way that FGM is regarded now, many of the little boys being circumcised right now in the States will feel the same way your friend feels - they'll look around, know that many men have retained all of their sexuality, while theirs was altered without their consent.
They'll have all the information about the sensitivity, etc that they've lost.
And they won't have the comfort of knowing/believing that everyone around them is in the same boat.
MGM and FGM are both genital cutting. And both are deplorable for exactly the same reasons.