I’ve never heard the Elex, but had a brief demo with the Clear. I loved it. Great tonality, and based on memory only, I’d say slightly better dynamics and a bit more detailed than the Elegia. Being open back, they do sound more open than the Elegia. That being said, and somewhat surprisingly, the Elegia seems to me to have very similar soundstage width, which is great for a closed back headphone.
I feel that the Elegia are good looking headphones, and very well built, but the Clear is downright beautiful. They do seem a bit more fragile than the Elegia, if only because of the mesh covering the ear cups, as opposed to the more rugged and durable feeling of the high quality plastic that the Elegia’s ear cups are made of. They do both use a light gray microfiber to line the underside of the headband and the inside of the ear pads, which doesn’t seem like the best choice since they will likely show discoloration after many hours of direct contact with skin and hair. In an effort to mitigate this, I bought a headband cover for my Elegia, and I wipe my ears down with a clean moist towel prior to using the headphone.
All in all, if you like the Elegia, you’re very likely to enjoy the Clear, and it’s my understanding that the Elex is very similar to the Clear. The only downside to buying either one is that they may sound too similar to the Elegia, which would make them a bit redundant for someone who owns the Elegia.