Besause none answered here, i decided to try it on my own.
I booked a Minecraft Gameserver (4 Solots, "Ultimate-Hardwareupgrade" for 3 Days (2,75€)
I uploaded the backup of our Revelation server and tried to play.
The Game is as laggy, as on the vServer.
Funfact: Hosted on my PC (i7-4790K with 7 GB of RAM allocated) the Server runs fine.
I sadly wasted 5€, but at least I know that i won´t use Nitrado again. Sorry.