The differences between the 180 and 200 gram Classic Records reissues are minimal - it's the same mastering, same metal work. On the other hand, the 45rpm reissue of the Reiner Pines of Rome is superb and well worth acquiring if you can find it.
It is important what lacquer you are referring to when talking about the "original". The 1s Pines is vastly superior in low bass thunder and dynamic to any later pressing.
This was called back by RCA because of too high dynamic swing and reported distortion by many customers and reviewers of the day.
The later lacquers are all more "conservative" in dynamics and maximum bass modulations.