In newton you have more options

- Sorry, I just want to argue...
1) While it is inbuilt/built-in... ok, I can't argue with you there

2) Newton offers sphere, box, and compound collisions. Compound collision will allow you to create any shape you want for an objects collision, using combinations of spheres and box's. This works great for buildings, cylinders, etc...
Setting an objects mass to 0 will make the object unmovable (for geometry). using compound collision with mass set to 0 works better for static models than 3DGS polygon collision.
3) You can do this is well with Newton

IMO - Newton is easier to use and more stable. However, it is harded to set up everything...