Funnily enough, I grew dwarf borlotti last year for the first time. i've grown climbing ones for several years with great success. a local gardener gave me some dwarf seed, so I tried them. But I wouldn't do them again. I already grow a couple of good rows of haricot white beans for drying. Harvesting them means a lot of bending down or kneeling (something I can no longer do easily after a half knee replacement a couple of years ago). So having to harvest more ground-level beans was unwelcome. They also took up more ground space, and tended to be dirtier. They were also smaller beans inside, although that might just have been that seed I was given. So back to the climbing ones for me!
