No? What, then?
At one coat each - same base color.
And at three coats for full opacity:
And side by side to clear out any questions:
Slight differences? Yes. But pretty much redundant ones? Yes.
To the left is Meep-Meep-Meep from The Muppets, and to the right is Let Me Entertain You from last year's Burlesque. So, the base color is identical, and the color shift of the particles are pretty much identical, but the particles of Meep-Meep-Meep are coarser, and a little more "plastic" - I personally don't think they qualify as classic glassfleck, but you may feel differently about this - while I tend to categorize the particles in Let Me Entertain You as more foil like. However, that's not really visible. What you can probably tell though, is that the coarser particles of Meep-Meep-Meep sits a bit more inside the polish, while the ones in Let Me Entertain You stays more on top.
If you're not a big collector of shades like these, you don't need both. Personally, if I'd go with just one of them, I'd pick Let Me Entertain You, as it is a bit more reflective and most of all: does not eat topcoat like Meep-Meep-Meep does.
Swedish word of the day:
tvilling -noun twin
I guess these are.