I've owned the ML 200/4 (not sure if it was the C version or normal) but I've never used the FD 200 so I can't compare them. I didn't like the ML 200 as it simply wasn't very sharp, wide open, and was OK stopped down but so are all lenses. I certainly wouldn't consider it a worthwhile lens and I wouldn't ever recommend one. Maybe I had a mediocre one but TBH I found most ML lenses (of the several I've owned over the years) to be average, with the odd exception.