there's a lot of disagreement on PCT out there. I can understand asking questions about that. It's only been in the last couple years that headway has been made on this site in that regard.
I don't know why the products are priced differently, but I doubt one is better than the other. The only thing that is relevant is the mg/ml. If that is the same, flip a coin between the two brands. When you just buy test, it's not going to be fake, and it's usually dosed close to what the label indicates.