Thank you, Rina! They have been repotted and are in a window sill full time. This picture was from when I first got them. Any idea what kind of Sempervivum?

Both of them look like Sempervivum. Semps are usually better off planted outside in the ground all year in part sun to full sun. Most of them are hardy to zone 5 and some of them are hardier. Yours are starting to show the effects of not getting enough light. If you decide to give them more sun then do it gradually. Plants can sunburn if they get a lot more light too fast.

Thanks, Polypompholyx! I have a west-facing apartment, so my options are limited. They're in a windowsill and getting as much light as I can get them (and I did acclimate them slowly...learned that one the hard way!).

Hard to ID semps, since there are many that are similar looking. They also cross very easily, and there are likely may unnamed cv. On top of that, your plants are not getting enough light and therefore do not look as they should - mainly color, that may help to get ID. In either case, exact name really doesn't matter since their needs are the same. It may be difficult to overwinter them indoors, since they really appreciate 'winter sleep' being hardy plants.

To get good growth, maybe you should consider supplemental lights; otherwise they will look too pale and the leaves recurved, as in 1st photo. 2nd plant is starting to do same thing.

I suppose I should use current photos. Those two were taken when I first got them. After a couple of weeks in the window (with succulent soil, well draining pots, rotating periodically), they look like this. Are they heading in the right direction?