Both are marketed as entry level guns for 2 top shelf companies. Price point for each was very good. I'm no expert but fit and finish goes to the sauer 100. More polished bluing, slicker, quieter bolt. Cycling rounds thru the action took some serious effort at first with the m18, not nearly as much with the sauer. Dry firing each...sauer sounds and feels tighter.

Wont be able to shoot the m18 for a few days, but if it groups well none of the above matters. I expect it to get better with more work, read a lot reviews by satisfied owners. Bought it primarily as a soft recoiling magnum in 6.5 prc, stepping down from 300 wsm.