I've always done side and rear laterals just to ensure I had even development in all areas of the shoulders, so I can't say that I noticed any development difference when I replaced the presses with front laterals.
To me, laterals are every bit as difficult as shoulder presses, and probably more miserable now that I think about it. And least with shoulder presses, you can push up some pretty heavy weight. Laterals are not impressive to watch, and because the weight is sitting out on the end of a lever called your arm, they will make you feel like a schoolgirl trying to lift weights for the first time due to the miniscule weight that can be lifted with good form.