I did a review of the studio pressed powder and while I like it, I can't actually see any differences between the powders themselves. With the Studio powder you get 9g V's 5g, the studio one comes with a mirror and a little storage compartment for a sponge.
Got this one, which is the darkest in the range to use for a contour and it works for that. I have tried various contour products and they all seem to have glitter in them which doesn't make for a very natural look. Then it occurred to me to just use a darker than my own skin tone pressed powder.
Only complaint is the packaging, it doesn't close tight enough and so can't have it in your bag.