Meg's strong to weak abrasive chart
 

Also, 101 is in front of 105 and 100 is slightly below 105.

Nice post this is good to know.

From my use of M105 both the old and new versions and M100 I give the nod to M100 for cut and working time. IMO. Need to add a few to the line-up like 66 and D300. Meguiars does have a lot of good solid compounds.

I haven't done any direct testing, but what I was saying is what I was told in a class by Jason Rose at Autogeek's Detail Fest.

Wait, so the scratch 2.0 isn't a type of thing that you just put on a Microfiber and work it into the scratch?

Name dropper.

Is that like staying at a Holiday Inn Express / j/k. I have seen Jasons comments on MOL but I think it depends on paint hardness and pad selection. Even with that it's very close. Where M100 shines is it's longer working time which might make it appear to be cutting faster. M105 is slowly dissapearing from my inventory. M100 and M101 have replaced it along with a few HD and Sonax products. Keep a eye out for 3D/HD to release HD ADAPT soon.Got lucky and have been testing it for Tunch Goren at 3D along with a dozen other guys. Check the facebook group for more info.

Scratch-X is excellent for working by hand.On a mf applicator or mf towel when doing a small scratch is where it shines. If you were to use it with a da and mf pad you would find it fairly aggresive. I have given it to plenty of Harley riders to carry in the saddle bags for removal of small scratches. Quick and easy. They mostly love it.

M101 foam-cut compound is supposedly stronger than M105. It's a rather recent release, so I haven't tried it yet.

101 is stronger than 105 I believe

M101 is extremely high cut. Remember to always start with the least abrasive product on a test spot. Never use stronger then you need to do corrections. There is only so much clearcoat and once its gone, its gone. You can adjust cut with a mixture of compounds. Kind of a custom blend . Many use M101 and D300 or M105. Some compounds are known for their cut while others their working time or finishing ability. Just a thought.