OPI is way better. But if you want a color that is pretty cheap and pretty decent, I would go with Sinful Colors. They're like two bucks a bottle and pretty decent quality.
I prefer Revlon.
That's like comparing a fly to a lion.
I think OPI is the best of the best.
I also recommend you "Rainbow Priorities". These nail polishes are AMAZING! I tried it a few months ago and I was surprised!
You cannot stop but buy these nailpolishs I did and I will always buy from here,
I bought from here a week ago within 3 days my nailpolish arrived.