68 vs 69 front discs for 318 barracuda - same?

When I search for disc brakes on auto parts warehouse, for example, i get drastically different prices when searching for a 68 318 barracuda versus a 69 318 barracuda.

Are the discs different between 68 and 69? Where do you guys get your a-body/barracuda front discs? Right now, I'm just looking to replace the stock stuff that is on there with OE (centrix for example) discs.

Thanks in advance.