Since I really love the first three styles of polish brand Only Her I took a couple of pictures for you to demonstrate the differences between them.
The three styles are Tabasco, Latte and Espresso (klick for review).
Latte and Espresso are basically the same style but different colours, Tabasco is the all new plunge bra.
I got all three bras in my usual size 30D (65D), the bandlengths are very much the same, although the Tabasco kinda feels wider. If you're between sizes you might try on the smaller bandsize too.
All three have in common the vertical seam and no horizontal seams which provides great support and shape for smaller breasts.
Tabasco has a lower center gore and the cups aren't as high as on Espresso or Latte, perfect plunge style :)
Although the measurements of the wires are pretty much the same, Tabasco's wires feel wider and reach more to the back. So if you experienced a little poking or cutting in breast tissue with Espresso and Latte you might give Tabasco a chance! (marked where the wires end in the pic).
Another difference are the elastic seams on the cups: Latte and Espresso have this cute seam on the cups, Tabasco doesn't and is therefore more open.
All three bras are designed with smaller and medium breasts in mind and as far as I see it: They really scored with the smaller breast issues.