Just did a side-by-side comparison yesterday. Sprayed OV on one forearm and MC on the other. The top notes were similar, but OV started to smell much better after a while. OV smelt more natural & sour. MC was more synthetic & sweet.
Without telling my wife which is which, I asked her to tell me which one she liked more. I then asked her again multiple times every so often, to see if her opinion would change with the different notes. On all of the occasions, she said she liked OV more. Said it smelt classier than MC.
Furthermore, OV lasted far longer on my skin than MC. Dry down smelt better as well. IMO, although slightly similar, OV is noticeably better than MC.