I like performance and supergo, they carry different things alot of the times. As for high pressure at supergo, I never ran into that at Supergo by my house. I live about 5 miles from a performance and supergo they are less the 100ft away from each other. I like the mechanic at supergo and they are there on the weekend while performance does not have a mechanic working the weekend. I bought from both places, employees at both are friendly and not pushy.