How old is your little one?
I haven't tried the tutto, but had itti d'lish SIO when dd was teeny. I found them really difficult - when they worked, they worked fabulously, far better than anything else... but they often didn't work at all. I think until their legs chunk out a bit they possibly aren't the best. They are nice and trim though, so that's a bonus. I have no idea if the tutto is the same.
Fuzzis I found quite good (stopped using them when dd was about 6months I think). The inserts didn't work for us, but dd has always pee'd for England, so I had to buy extra inserts to go in them. Not sure if that'd be the same with a normal wetter.