I've not used Essie other than the 3 way glaze, so I can't really judge. That certainly isn't anything amazing, it gives a lovely shine but it didn't prevent chipping any more than any other top coat, and it smells really perculiar, like curry >< Though I had a job that was very hands on, required moving furniture about and so on, and
no varnish survived without chipping very quickly. I can think of just one time when I got through a whole day with fresh nails and didn't get any chips, and that was with a complete Opi mani; base coat, 3 coats of polish, and top coat.
I'd have liked the chance to road test Essie in the same way, but I had to clamp down on my polish purchasing >< Oh wait, I do have a twinpack of minis; Braziliant and Super Bossa Nova, and a blue that I can't remember the name of, but was a bit disappointed in colour-wise. Something to do with sailing...it didn't look as nice on as it did in the bottle, anyway. But I guess I'd say that from my limited experience I prefer the texture of Opi, though I know the formulas are different depending on the polish's finish. I had this creamy aqua colour that I gave away because it was too thick for me to be able to apply it with any level of success. I never progressed beyond novice with application skills, wasn't quick enough, so a thick polish is liable to end up with drag marks if I'm not careful.
So kind of typical that I fell in love with dark blue shades, nothing quite like a dark colour for highlighting every little mistake that you made putting it on ><
My total fave shade
Blue My Mind
It went all thick and gloopy and took about quarter of a bottle of top coat to get it back to a usable consistency, I've not looked to see how it's behaving now >.>
Oh! I found the pic I took when I was playing with the Essie polish. This was only on that one nail, lol, just to see if I could do it, I used a Post-it for the straight line.
I've just not have enough experience of either brand to have had a chance to form a preference, so in conclusion, if some rich benefactor wanted to provide me with a wide selection of both produce ranges to test, I'd be happy to do that.