As said in technos stream, dream and dreamXd are completely different.

With dream being in survival mode all the time and dreamXD being in creative.

But if we are talking canonically, dreamXD makes sure no one breaks the rules of the dream smp.

So say, techno and philza were to go to the end. DreamXD would join the game and break the portal as he did in the stream.

Any other rules being broken? DreamXD to the rescue to stop whoever breaks the rules!