I would repot them now.

Water them first.

I would re-pot them also. I wouldn't put them by the window right away, looks like some frigid cold is coming to the north east. They both look nice & healthy, congrats on your new additions..
Christine

Hope you'll be adding perlite to the mix for the Sans. It needs to be much faster draining that peaty mix will allow.

There is no rush to repot them now - they don't appear to be at all root bound. The soil does look like it will retain a lot of water, especially in that shallow container, so potting up would likely be over-potting, and probably not be in the best interest of the plant at this time.

I'd take some time now to learn about what kind of soil they would prefer to be in, and plan on bare-rooting and repotting into a good soil next June. A good soil is a soil you can completely saturate, so plenty of water exits the drain hole when you water (there ARE drain holes?) - without having to worry that the soil will remain wet so long the roots will rot or root function will be impaired by the lack of air due to a soggy soil.

Growers with green thumbs usually have a plan, and it's usually conceived while looking at things from the plant's perspective.

Al

I had a little Sans like that last winter, waiting for spring. I cut the side of the pot so the pup could break free while waiting. I was able to slide my plant out of the pot with the soil/root ball intact, so I knew what was going on in there. Will yours slide out like that so you can see what's going on?

These are cheerful little plants, healthy looking. I hope they help! I get the winter blues too, stuck inside most of the time. Planning what to do with the plants in spring helps some, a lot. Virtual hug!

The Sans was completely root bound, and I ended up cutting it out of the plastic pot, and while I was at it, I broke it into 3. "Baby" 1 has an inch of new growth. Baby 2 is just hanging out and mama is a bit grumpy and the top half of one of the 2 remaining leafs has flopped over, but it doesn't seem to be doing anything else at the moment. I'm a bit worried and furious, I saw some primula on sale at my local high end grocery store and grabbed it and sat it with all the other houseplants for 72 hours. The leaves started curling under so I began investigating, and saw some sort of little bug crawl right across the leaf. So I banished it to my daughters room as she's been begging for a plant of her own, so I'll let her drown it up. But now I have to keep an eye on them all- is there something preventative that I can do with stuff around the house(like cinnamon powder for that mold on seedling dirt) that won't hurt them as they start to come out of dormancy?