The draw is the identical. I even went to far as to measure the downstem and hose ports on My MZ and both of my KM's as there are some who swear that MZ's are more restrictive. They're the same.
Corrosion shouldn't be a factor as, except for the plastic 'pears', it's all stainless steel. I've had mine for two years and it still looks the same as the day I bought it.
Build quality on mine is excellent. No imperfections whatsoever. It shows that being 'handmade' doesn't mean you have to settle for less.
And the color isn't something that can't be fixed with a little paint.