Yes Poodles have a small build, but no most Poodles would NOT look like HKdog's if they were shaved to the skin. Also, there's a very big difference in his dog's weight and yours. Your dog has some padding and muscle mass. Using the chart lined below, your dog is probably a "5" which is "ideal", his dog is probably a "2" which is "very thin".
http://gianteagle.petkare.com/index.asp?FrameId=4&CMD=Menu&SId=2150
Anyway, tony_hk- How many times a day are you feeding your dog? Eating too much at any one time will cause digestive upset. To put weight on a dog I would feed 3-5 small meals a day. I'm a little concerned though that you've been feeding him the recommended amount of a high quality food and he's so thin.
Have you had him checked for parasites recently? Tapeworms or whipworms will cause a dog to be underweight no matter how much they eat because they leech the nutrients from the dog's food. Your dog just doesn't look healthy to me and I would take him to the vet for a full checkup.