As a general rule, we don't make leaderboard categories for modded speedruns because they are not official content and usually don't get enough widespread interest. That being said, feel free to make up your own rules and complete some runs with a randomizer mod of your choice, and post your times either in a forum thread, or in the community discord, here: https://discord.gg/antielitz

Yes it's the only difference. It has the potential to change the strategy massively though