Just wondering if you found this guide.
Never done Crashplan, but from experience I can tell you the following:
Do the two programs interfer with each other? No they should not
two seperate realtime backup programs slowing the computers down: yes this is possible especially if they run at the same time. Most backup solutions have a time to set them to.
Maybe it would be better to set one for realtime backup, and the other for daily backup? You could try different scenarios, but yes.
Some other solutions are also safepoints and rsync.
