Left to Right: Jade Psicodelica, Layla Mercury Twilight, Gosh Holographic and China Glaze OMG.
Jade and Gosh are 3 coats while Layla and ChG are 2 coats.
*As you can see, Gosh has the most rainbow bling of them all.
*Jade is a thin, watery holographic and 4 coats to become nicely opaque. Layering this over a silver base coat would cut down on the coats needed.
*Jade and Layla have a 'scattered holo' effect, whereas Gosh and ChG have a linear effect.
*My favourite is the linear with Gosh as my most used color. Apparently the Chanel silver holo is pretty much identical to Gosh.
Hope this helps someone picking their most prefered silver holo!