Most of the time what our bp's pass as far as poop looks pretty much like a large cat poop unless of course they've slithered through it, laid on it or otherwise made a big mess of it. Also they don't seem to always pass their urates at the same time or in the same place as they have their stinky dump.
If there is ever a concern about your snake's poop (or it's health in general), most vets do fecals for a very reasonable price (I think mine charges around $23.00). You just scoop up the poop, pop it into a ziploc baggie, store it in the fridge and drop it off to the vet as soon as you can. Some will do the fecal right there and then while you wait if you let them know ahead of time you are bringing it in.
~~Jo~~