I mean, I don't see any similarities my sister pointed out that Eabha sounds like Adele. To me, Adele sounds horrible and her voice is way too raw. Eabha has a real voice that is stirring and melodic.
You couldn't be more wrong about Adele, if you think she sounds horrible then your hearing must be off. Just because she sounds different to you that doesn't make it bad. You are entitled to your own opinion however your opinion differs from millions and millions of people all around the world and Adele has the record sales and awards to prove it.