Indeed, it look very similar. Thanks for your suggestion ! However, I dont know what to think. E. xylina seems restricted to the West coast of North America ! This would be a very unusual mention for the North-East.

Handfield's Papillons du Quebec reports Eulithis xylina as very rare from southern Quebec. I don't know if that's what it is, but surely it is Eulithis.

Really sorry about that - they're just so common on the west coast, I obviously jumped to the wrong conclusion!

Concerning Eulithis xylina, I certainly do not have the skills to confirm or deny this possibility. However, I do not think that this species should be rejected on the pretext that she is rare, if not absent, from Quebec. I come from the world of ornithology and it is common that birds from the South, the West and even Europe, goes astray in Quebec. Most of them, transported by extreme weather conditions. I guess the same thing can happen with moth. Anyway, I want to thank everyone for the time invested on this moth.

On this one I did check a couple more sources...Eulthis serrataria might also be an option and it's certainly eastern. Quite similar in appearance to E. xylina, although more yellow/ochre around the AM & PM lines. Looks like it could be the case in yours, but hard to tell.
At least we're all agreed on genus!