I vote for 303 on interior plastics. On my tires, I have found that original armorall seems to look fine. However, I think 303 would have better UV protection. 303 just costs more.
Even then I have tried many of the OTC tire shine products and find they have similar durability. BTW, Turtle wax wet'n black tire dressing has UV inhibitors. I have used it and seems to hold up fairly well to rain.