I have the Micro 9. It shoots fine and is very accurate, but then I have spent a lot of time shooting pistols of all types. Unlike some others I don't think the Micro 9 is necessarily harder to shoot accurately, but..
It is not a 1911, and 1911's triggers by virtue of their design pull straight back. The Micro 9 trigger is hinged at the top and while it has the appearance of a 1911 trigger, it does not pull straight back...almost, but not quite. Inexperienced shooters tend to pull the muzzle down when shooting fast, partly because they are jerking the hinged trigger, which creates a downward tendency in the muzzle.
I love my Micro 9, but if I knew then what I know now, I'd buy an Ultra instead...any Ultra I could afford, even if it was the lowest priced "edition". I would, however, buy it in 45, which I prefer as a defensive round.
If I were you, I'd go somewhere where I could handle and try the triggers on both. There are other pistol manufacturers who make plainer 3-3.5" 1911's for a little less $$ than the Kimber. I'd handle those too.
The question you're asking of "why pay more" is one only you can answer.