I’m not going to say I can tell the difference between Pentile and RGB because I probably can’t. I agree with you on that. What I can tell the difference between is Pepsi and Coke. They aren’t meant to taste exactly the same. They are supposed to taste different. I’m not proud of it but I drink about 5 Cokes a day. When I am at work, we only have Pepsi which I will drink when Coke is not available. A couple guys at work thought the same thing you did and gave me three tests. Every single time, I chose Coke and I chose Coke TWICE without even needing to taste the Pepsi. Trust me man. If someone drinks Coke as much as I do, it is very easy to tell the difference between the two. They are supposed to taste different.