'Little Treasure' grows a lot better than 'Little Jay'. I've had this a couple of years whereas 'Little Jay' didn't make it to its 3rd year with me.
'Lakeside Elfin Fire' grew very well in a pot. Then I tried to make a border with it which didn't work well. I consolidated what I could into a group and it's struggling along, but I'm seeing more and more leaves that are half green.
'Lakeside Zinger' is, I believe, classified as mini though I don't really think of mine as such. Another that forms a very dense mound. I fully divided it a couple of years ago and you'd never know it. Somewhere in the mound is a little bit that has sported to 'Lakeside Zing Zang', but unless it grows more I'm not separating it.
'Pandora's Box' is the last of the 'Baby Bunting' family and it's not growing quickly, but it IS hanging in there.
Is 'Peanut' a mini? I'm not really sure, but it sure isn't big in my garden. However, so far, at least, it's not reverting to 'Goober'.
I think 'Pixie Vamp' is a mini, but am not sure. New last year and still in a pot, but seems enthusiastic.
'Popo' I've had for a couple of years and it's quite small, but growing.
'Silver Threads and Golden Needles' is another mini that I don't really think of as mini, but I'm sure it's on the list. The leaves will get a bit darker during the season.
'Stiletto' would probably make a good border, but so far, at least, I've allowed it to grow in a nice, well-behaved mound. I've had it 5 or 6 years.