On weight I would guess that the Kooba (I have one) and the paddington would easily outweigh ANY Choo bag. That's one of the things I love about JC bags, they're so light!
Funny you should ask this. My very first lux bag was a Chloe. After carrying it for 2 hours, my arm went numb...and I didn't have it loaded. I traded it in the very next day for a Choo Ramona.
When I purchased a Chloe Paddy, I felt like I was carrying Brick
I even removed the padlock thinking it might lighten the load, but no luck
I love the Ramona & the Mahala, but if you are looking for a really lightweight bag, go for any of the Jimmy Choo Bags in the distressed leather (i.e Ring, Ramona, Rik)