The difference between this and a painted French
A painted French puts a white stripe on top of a finished nail. Two weeks later the nail has grown, the stripe has moved, and there is a gap of bare nail between your cuticle and where the color starts. Pink & white builds the white into the nail's structure at the free edge, so growth pushes the whole thing forward evenly and the line stays where it belongs.
That is why people who wear pink & white tend to keep wearing it. It costs more up front than a painted French tip and it repays that over the following three weeks.