The most relevant distinction between the two from the company's perspective, IMHO, is that the product manager is often seen as potential revenue generating ag

The most relevant distinction between the two from the company's perspective, IMHO, is that the product manager is often seen as potential revenue generating agent, whereas the project manager is pure operational cost. One would have to articulate a lot to make a point about a project manager being directly associated with sales/revenue etc. -- the top line. "Oh yeah, the project manager can increase customer satisfaction and then contribute to upselling, especially in companies focused on farming and not much on hunting customers!" -- I agree, but it's rare now.