Not quite the same. The production red is red and the high laying attributes of the Leghorn, the bird of choice that is typically mixed into them, is back enough generations that the bird looks to be a dusty, orange brown, yet still reddish, both males and females. This is also what most hatcheries sell as Rhode Island Reds. They are not shaped correctly (no brick shape) and lack the deep, mahogany color that a true bred, RIR should have.
The Red Sex Link is a different thing. This is a red/gold male used over a silver/white female. This produces chicks that can be sexed at hatch. The females are reddish, with some white feathers while the males are white.
Both production reds and Red Sex Links are notoriously good layers.
Hi Fred! Thanks again for your help! I was wondering what you meant by RIR having a brick shape? I only ask because my roo is getting what I would say is a pretty "box-ey" shape when viewed from the top... he is also getting darker as days go by. I have no doubt now that mine are, indeed, PR - im just curious