Tanya, that is hilarious. I wish we could go on a summer outing together sporting our reverse coloured outfits!
Sveta, I haven't seen the cashmere sweater in nickel, but I can certainly vouch for its quality. It drapes well, also. I usually wear xs at J. Crew but ordered it in S because I was burned by those Tippis that were not as fluid as I wanted...so the fit is oversize on me in S but not ridiculously so (in my opinion). It fits on the shoulder, just loose in the body.
I really like the tunic you linked to also!!
Here are my thoughts on the fit of the sweaters, FWIW:
If they say "semifitted" (as with the Tippi) they really mean that, and some of them will be fitted vs. semifitted.
If they say "relaxed" they mean that, too. These will fit much looser to begin with, and will probably look okay a bit oversized.
If they say "oversized," again -- they mean it -- and these will fit very loose even in your regular size. But if the drape is good they may look good on you in a larger size.
You and I both have the shoulder breadth (in our relative sizes) to carry a slightly larger size if desired.