As other suggested...
I was very curious and I recently compared scott rv to regular scott. I took 2 containers and placed 2 cups of water and about 1.5 foot piece of TP in each one.
Let it sit for about 20 minutes.
Stirred it up with my finger and surprisingly the regular scott broke into smaller pieces and was less "consistent"/"thick"...
The scott RV still did well, but it shows there is nothing wrong with using regular scott tissue.
*Other brands may behave differently. Try it yourself. Easy to do and the TP will get used either way.