Yep I too will have to agree, the chart is not very accurate but I think it's hard to put any colour over white and have it come out exactly the same.
Purely pink is slightly opaque (but not full opaque) and I use it often.
I use Purely Pink Masque in zone 2 to cover natural smile line and extend nail bed then I blend Purely Pink into zone 2 from zone 3 and this gives a more natural look cause most times if the client has a moon, it still shows through but even if they don't, it still gives a slightly more sheer natural not so solid colour to the nail. It takes a bit of practice to get the mix ratio right so you don't see any blend line but once you have it, you have it
It's one of my fave mixes to use now and I'm so glad I was introduced to it.
Radiant Pink is sheer and quite a intense pink and I find gives the nail a nice pink glow.
Pink Masque is the cool version of the opaque powders and Purely Pink Masque the warm version but the Pink Masque is way to bubble gum fake pink for my liking and I wont use it. I even find the Purely Pink Masque too pink sometimes and I have to custom blend it to make it warmer for some clients.
The new Winning White is just beautiful!!! So if you are after a really white white that does not yellow at all, go for this one (not that I have ever found any of NSI's white to yellow though).
You can buy small test pots of all the Attraction range, so maybe get some and try them before buying up big. You can get a few sets out of one small pot easily