These are my fave choices of shades to use for a gradient/ombre effect on nails with the shades of lilac to pink. Personally, I'm not a purple or a lilac kinda girl, but on the nails, I don't mind it as much. All of these shades are very sparkly and have an irridescent feel, but the most matte of the five would be OPI 'Planks A Lot'. They're pretty good for a lighter feel on the nails as none of them are overpowering. I usually go for the lilacs on my baby finger, finishing with the pink on the thumb nail.
Out of Jessica and OPI, I do prefer OPI. I find the consistency slightly better and application very very easy. However, Jessica is a brilliant brand of polish and has some brilliant bright shades for the Summer months (cough..what Summer..cough). Out of the five of these shades, my favourite is definitely OPI Princesses Rule, hence the dried explosion of polish stuck to the side of the bottle.
I've run out of nail wheels so no swatches at the moment, but I plan to get some swatches up on a new nail swatch page asap. Would anyone be interested in seeing some nail polish collections?