We're each discernably more mustachian in separate areas and overlap only in some, so it's hard to answer the above question. Where he's already following mustachian principles he's great (possibly better than me), but he is VERY resistant to becoming more mustachian in the areas he's not already because he doesn't understand why it's worth the effort. I'm much more open to changing my ways and trying new things as I've signed onto the idea of early retirement being possible. For example, I used to want the heat up to 72 ("it's freeeeeezing") and I'm trying to keep the heat down more in the winter now that we've bought a house. I scrutinze all of my spending much more closely now. I've also been working on educating myself about investments and improving my investing strategies (I used to have my dad do a lot of trading, I'm trying to move to a long-term buy and hold).
We both have always lived below our means, saving for retirement, maxing out accounts (now, hasn't been always), and somewhat cheaper transportation. (He has a cheap used car. Other than a 4 month blip of a gifted car, I never owned a car.) He uses a 4-5 year old non-smart phone. He doesn't buy much, so he'll go clothes shopping only 1, maybe 2 times a year for example. Meanwhile, I try to get the best price possible for my purchases, so I'll carefully shop for clothes, groceries, applicances, etc., trying to pair multiple sales, coupons, rebates, and credit card rewards or discounts. Last night for example, I made him break our grocery purchases into two transactions to use a $0.50 cent off coupon if you spent over $25 (we spent $25.30 and $26). He would otherwise just pay full price on those times he decided he needed/wanted something. He's actually coming on board with this for groceries at least because the few times I didn't have time to plan meals & the trip in advance, he was horrified at how expensive groceries were now.
But, when he does spend, he'll spend heavily on convenience. He would be happy buying takeout meals or eating out virtually *every single day* instead of cooking from scratch from home. So I do all of the cooking and most of the cleanup (oh joyous rapture). He'll buy a coffee every single day while out, and lunch out every day. (Been working with him on this and we've compromised with a Keurig.) If we do go out with friends, he'll order multiple drinks rather than just one.
Meanwhile, I've tended to splurge on some bigger things (I recently did two laser hair removal packages from Groupon, and I've wanted some slightly nicer upgrades in our kitchen reno/necessary items for the new house). I think it comes from the idea that if I am going to buy something, I should buy it once to really last. So I've got a much nicer knife set than he had, on the idea it's a daily used item, which will last a long time if we take care of them.