No, but the fact that Skarmory will get OHKO'd/2HKO'd by almost every single Special Move, while Mandibuzz is usually able to take one or two is also something that's to be desired for Skarm. The lack of Taunt, Overcoat, and STAB Foul Play also hurt it a lot.
That's not the point, the question is which one is the better physical wall, which skarm happens to be. Don't get me wrong, Mandi is very good too. Each one of them has their own pros and cons. Skarm for example has Sturdy, so it won't be taken down easily even by surprise. Overcoat is useful too, but for different reasons.
Also, skarm does have access to taunt. --- FC Pokemon X: 3754-7474-9217. IGN: Gledy. TSV: 1430. My Trade List: tinyurl.com/ou6xsm4