M. karwinskiana maybe?

This is another plant I've been trying to ID. Someone suggested M. karwinskiana and I found images for M. karwinskiana ssp beiselii that looked close but with white hairs on the areoles and the spine color is lighter.
I'm sure mine will not always be purple though

I got the plant from someone that said they did not like it and did not want it.

Can anyone find a better match for it?

Oh yeah... it's only about an inch and a half wide and about 2.5 inches tall.

TIA

Paul

When I first looked at the photo, I thought of M. voburnensis rather than M. karwinskiana. It looks to me as though it has at least 1 central spine, and the colouring of the plant is more typical of voburnensis that karwinskiana. There is a form with longish spines which was called voburnensis v. quetzalcoatl, but I'm not sure that any subspecies are recognised now.
There are similarities between these two species, and I wouldn't get too worried about the lack of wool on the areoles, as this can vary a lot and can be cultivation and light dependant.
I'm not a 100% sure though, so it would be good to have some other members' views.....

Hi Chris, that does look pretty close. I was under the assumption the color was due to too much sun... or even the cold. It's a little dehydrated right now too so that makes it look a bit spinier. The wool you do see is from aborted flower buds I didn't notice at some point. It must have gotten wet during the winter (rain) and started budding but since I didn't notice, it didn't get anymore water and thats what I got :?
I suppose if it does bloom this year (I doubt it though) I'm sure it will make an ID much easier

Thanks.