There have been a couple of queries in this thread about Mat Velvet shades, so I thought I'd post a couple of swatches (if it's OK to post these in this thread? Please feel free to move if not). Sorry about the lighting - it's dark and snowing here!
From left to right:
MAC Studio Fix Fluid in shades NC25, NC30, & NC35, MUFE Mat Velvet in shades #35 (Vanilla), and #40 (Natural Beige).
(Top and bottom photos are of the same swatches).
I am normally a shade NC30 in MAC. I have found that I am basically in between shades #35 and #40 in Mat Velvet. Both look good on me, although I am wearing #40 right now because I'm a little lighter. #35 is more of a peachy/beige colour. #40 is slightly lighter than shade #35 (counterintuitive, I know!) and has more yellow undertones. Due to the yellowness, it's probably closest to to the MAC "NC" family of shades. It's probably the closest to the MAC NC30 shade.
I also had Mat Velvet in Shade #30 (Porcelain), although I returned it before I took this photo - it's a lot lighter than shades #35 and #40. It was a lot peachier and less yellow than MAC Studio Fix Fluid in NC25, so not really a comparable shade.
Anyways, I hope that this is helpful for someone! I also found that reading the shade descriptions on Sephora helped in choosing shades, as MUFE's colour system seems a little weird, but the Sephora descriptions seem accurate so far to me.