It's all in your mind, son.

They're just the same strings made by the same company. You've tricked yourself into believing there's a real difference but there isn't. You just think there is supposed to be.

Nobody else hears the difference--only you. You could buy the cheapest strings out there and no one will hear any difference. They only thing they know is whether you suck or not and, often, many of them don't even know that.

My advice is to buy the cheapest strings--they sound the same, they last as long, you save money, and no one else cares a rabbit's turd what strings you're playing on.