WHAT EXACTLY do you mean by nodded, if its modded what exactly are the mods.
I had both the elegia and the wp900 which I compared extensively.
They both perform at a similar sound quality but the wp900 is more detailed. Very different signatures so take with a grain of salt.
The most important thing is fit, both the elegia and the wp900 have had problems fitting in peoples heads ruining the sound completely. This may be possible to fix with pad rolling but I recommend the stock pads for maximum detail retrieval.
After that is very easy to choose
Soundstage size are very similar, noise isolation is better with elegia by a lot, comfort depends on your head. I prefer wp900 comfort.
If you want a studio like sound, with great separation, clear and clean sound, something thats close to the original recording, and blacker background, it also has more weight in the midrange. Then go ELEGIA
If you want a heavy v shape, that will make your ears rumble (without hurting), and a bright sparkling sound, with a wooden slower decay, great texturing, great detail inspite of the "dirty" bass and also great female vocals. Then go for the wp900
Important: the wp900 midrange is quite a bit weaker than elegias, if you care A LOT about the midrange elegias are better.