Can any MTB rear derailleur be mounted to a Scott type 1 MTB derailleur hanger?
The thread on a derailleur fixing bolt is typically 10mm x 1mm thread pitch.  For almost any standard derailleur, that will be correct. 

There are a few very new designs on the market which might not fit, namely Shimano's new direct mount derailleur system, but that would be a special order in most shops at this stage.  

Anything on the market for 9 speed mountain should fit a 10 x 1 thread.

So to answer your question:

Technically, no, not any derailleur will mount to your Scott derailleur hanger.

As a practical matter, yes, you are pretty safe ordering any 9 speed MTB derailleur, and it will work.  And if it looks like the same mount, it will be. 

That said, it sounds like you may have cross threaded your derailleur hanger when you tried to change it the first time, so you may also want to pick up a spare derailleur hanger.