Having a vintage pair on my 81 LeTour Tourist I wasn't prepared for the 'tight fit' the mks steel ones afforded on the breezer.
From experience (preferably) what mini clips seem to afford the best fit (given we arn't always wearing cycling shoes while riding.)for everyday wear (sneakers, shoes, cleatless mtn bike shoes)
My main complaint with the mks steel (over the vintage steel mini clips) seems to be in how deep the clip is. It seems to pinch (and I've tried reforming the steel toe box over a solid block to give a looser fit) and ride far up the lace area of the shoe making quick disengagement a real issue.