I bought the Tempête PM when it came out last year. It is a small bag; not a problem if you’re used to small bags. It can fit: phone, compact wallet, key pouch, lipstick, hand sanitizer, compact tissue pack, EITHER sunnies or readers, but not both. The issue with the PM is weight/space ratio due to the calfskin lining. Delvaux linings are so beautifully fitted, the bags could almost be worn inside out.
Valextra for example uses chèvre for their linings, which is much lighter.
As for the Brillant mini, I have a highly embellished one that I use for dressy occasions only. I find getting into the bag a pain, and I can’t do it one-handed, so the mini for everyday carry wouldn’t suit my lifestyle.
it is all a question of perception and taste.
Yes, Delvaux colours are fab. If you see one you like, jump on it because they are seasonal, and don’t reappear. Of course there are standards such as végétal, black, etc. that are usually in stock.
Good luck with your decision.