Generally speaking, film has a much better resolution than
digital cameras. In fact, if you were to compare good 35mm color
film to the "megapixel" rating of digital cameras, film would rate
in the area of 24 megapixels. The problem is not with the
resolution of the storage media (digital vs. film), but rather the
abilities of the cameras themselves. A disposable camera is going
to have a disposable lens in it. Lenses have a very big impact on
the quality of your photos. So, in short, the disposable camera
might have a better resolution, but the digital camera will likely
have sharper pictures. The operative word here is disposable. Most
of the 'disposables' on the market would be better if they were
disposed of before taking pictures.