Would you rather have a cup of diarrhea or a large turd? I find the diahrrea will have a smoother creamier taste to it than the shit log. Yet the turd may have a hidden surprise inside of it, much like finding the prize in a cracker jack box, but it'll most likely be a lone piece of corn or a peanut. Also having the leftover poop in your teeth for later is an advantage over the liquid diahrrea.
I imagine the diarrhea will be ingested much too fast to give any real pleasure to your taste buds. The poop log will be there to munch on for many minutes, like a large snickers bar, except it's a delectible anal dump.
You can also do many more things will a shit log. You can use it as a pencil on a math test, lay it on your doorstep as a doormat, or just smear it all over your teddy bears. The diahrrea will just make a mess because it has no real shape or stucture. The only other use I can think of is using it as hair spray.
Nib High football rules.