I was gonna say that I have 'Little Warty' and this looks like a Big Warty, if there was such a plant! Then I read denise's post and vóila, I now know how mine will look when its grown up!

Hi James, Pesonally, I don't think combining 2 diff. ones in same pot is a problem; I tend not to do it, but I don't think it'd be harmful. Also I find them pretty slow growing (at least here indoors in NYC), so you'd have time to change/separate them if/when needed. I like your variegated one, tho' I have a thing for variegated plants, I don't yet have any among my Gasterias (which are mostly no ID). Cute little pup coming up there too! They look happy too! The lighter green one is an interesting/attractive form which I don't think I'd seen before, any idea of its name?

@palmbob thanks for the suggestion. A LOT of sunlight is currently not possible for my apartment windowsill gardening, but I might move it to my aunt's house for better sun exposure. @Tracy Thanks for the kind comment! I kept all my plants where they were during summer at the windowsills pretty much because I have no other place for it. The temperature at night could get quite low at the windows, but I think most of the plants I have are hardy enough to withstand it. 2 things I tried to be cautious about: as much light as possible, and much less watering. I also rotate the plants regularly and put them at different places on the windowsill to even out the light exposure.

Seedmoney - This is a tough one (and probably why you would ask, ha). The closest I could find was Gasteria gracilis variegata or some hybrid of that. I also don't think it is an intergeneric.