i personally like clemence over togo because clemence is much smoother buttery but in a 40cm, clemence might be too soft and cause the bag to sag. just a generalization since clemence can be as firm as most togo or you could get a togo that is as soft as most clemence. sorry if i'm sounding confusing. if both were the same stiffness, i would choose clemence. you should check it out without any stuffing (eg air pillows) and see how it stands on its own. if you like slouchy, then go clemence!!!
I have pondered this very same question. I am not a floppy bag kinda gal. I prefer some structure, though I do feel that since the 40cm is more of a casual bag, the slouch looks great on it. Whoever though sag could look so good! LOL
It is a tough call because I also love how soft clemence feels. It is what made me fall in love with H, yet I do not own any bags in this leather. There is nothing like it...but I do think if it came down to it, I would ultimately settle with togo (or even a more rigid leather like box or epsom in a fun color).
I would say that in 40 there is no garantee that the Togo won't sloutch as well so go for it. There is not a huge difference between the two leathers (in my mind). If you want something sturdier I would wait and get another typ of leather such as epsom or fjord.