Is my puppy a Shih Tzu or a Lhasa Apso?

The breeder who sold him said he was a Shih Tzu, which is what i wanted. My puppy, Logan, was given to me as a surprise after my rescued shih tzu died a week after i rescued him from the animal shelter. I'm just not sure that Logan is really a Shih Tzu and not a Lhasa Apso..... Since Yahoo won't let me post the pics here, i put them on imageshack. http://img709.imageshack.us/g/032411135752.jpg/