Go with the 110 if you go with a Dunlop. Michelin tires are sized different than Dunlop.
By this, I mean that they have a shorter sidewall and due to this you need to go to a larger width to equal the size of a Dunlop.
Dunlop 110/100-18 = Michelin 130/80-18
I don't know why this is, but this is the info that I have always been given.
I currently have a worn (not real bad, but starting to show a lot of age=miles) 110/100-18 Dunlop 752. I've run them for years, but have never been happy with the wear.
The Woman's Forum moderator's husband was a member of our enduro club. He rides a KTM300 and the Michelin S-12 on his bike is what sold me on the tire. Dave and Lori ride all the time, competitively, and after over a year of harescrambles, and tons of play riding, the S-12 was still sharp and barely worn.
I'm not telling you that you should have a S-12. There's a lot of great tires out there, by a lot of companys.
As long as you follow the manufactures recommendations about the terrain you're riding, I don't think you can get burned.
Good luck and let us know what you picked, and how you like it!!! It'll be a new tire, so it will always be great..
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There is a very fine line between "hobby" and "mental illness."