i haven't stayed at the portofino, so i don't know exactly what the difference is between a deluxe and a kid's suite at that particular hotel. however, i CAN say, that we spent a week in anaheim (5 days in the parks) in 2007, and we LOVED the kid's suite. it was the first time we had ever booked one, we have 4 children, aged 15, 9, 6, and 2 at the time. we took one queen bed, the 15 year old got the other, the 9 year old got the top bunk, and the 6 and 2 year olds slept at opposite ends of the bottom bunk. it was so nice. the kid's suite where we stayed had a door that closed to the main room, but with a large window (on the door), so we could pull back the curtains and still see what was going on in there. they had their own a/c unit, a small dresser for their clothes, a little table and chairs, plus their own t.v.
they had enough floor space to play with toys we'd brought from home, and it was really nice to have the extra drawer space.
we're going back in may of next year, and will be getting a kid's suite again. when we are in anaheim for just one night, we get a cheaper room somewhere else because for a 2 day at DL, we're literally only in the room to sleep. but for a longer trip, 5 days in the parks, the suite is so much more comfortable, because we spend more time at the hotel.
hope this helps!