Heh. You don't have to look at the Stellias when they're parked on your head, and anyone else who would judge the color has probably never heard them.
Anyway, I have both. Elegias are my everyday headphones for work. I like them so much I bought a second pair and defaced them with a modmic so I can use them for gaming. I've also used that same headset for conference calls for work, though the Elegias are so revealing that I feel like I can hear what people had for lunch, lol.
Impedance is, I want to say, 36-ish ohms? That's from memory. In any case, they work well with the SPK and SPKM. Bonus points: they come with Focal's very well-made case that is perfect protection if you're going to commute with them.
The stock cable is trash, but if you're going to upgrade to a 2.5mm balanced then that's not really an issue. I have a desktop rig at the office (Topping DX7s + THX AAA 789) and use a 2.5 -> XLR adapter for listening there:
Pictured above is Moon Silver Dragon cable, though I use this "cheapie" with my other pair of Elegias:
https://smile.amazon.com/gp/product/B07BDJKNQF/
The Dragon cable is great, but a little stiff. I got the cable from Amazon in 2m and it is very supple, a good length for desktop use and not too long or cumbersome for portable use.