Early seed potato swap

I always grow Lady Christl. This year T&M have for some reason substituted them with another early called Swift. Has anyone any experience of this variety? Is it going to be as nice as my Lady C or should I go to a different supplier and cancel my T&M order?

I appreciate I'm very late in replying to this, but I've just been told by a very helpful lady at Bridgend Garden Centre that she's been unable to get any saleable Lady C from anywhere this year. There appears to have been a general crop failure so I wouldn't hold out much hope of picking some up on the offchance.