Projection vs Intersection

[[Ro...]]

What is the difference between an intersection and a projection of a cylinder onto a plane? A program I am working on is using a projection to a plane to get the true position of a bore at a compound angle. I have not seen that before, and personally would have used an intersection to said plane. I ask because I get very different results when using one vs the other. 

[[Ri...]]

I believe that the biggest difference with projection is the order in which it is set, so make sure you aren’t actually projecting the plane to the cylinder.