I've tried all of MdC's soaps (currently rotating 4) and I don't notice any benzoin in the Agrumes scent.
How old was your jar? I’ve had two, one in the old packaging and one in the new. The old packaging was pure lemon. The new had a bit of a resinous note in the scent which I assume was benzoin. May have been an anomaly.
There is. I’ve owned the Nature version and it has a weird resin smell (it’s well documented in this forum that MdC Nature is not unscented). I sold mine, but I don’t mind the benzoin mixed in with the other scents like Original and FougereI don't think you'll find it in their unscented Nature soap.
You could give the Vetyver a try.I don't like the way it smells at all. Turned me off of MdC completely.