I recently bought a Dunlop SP8000 for $100.00 hoping that I could find another one to match it. I have searched everywhere, and I mean everwhere. I could not find one so I bought the 8000s replacement, the Dunlop 8080E. Even though the tread pattern is simular but not axact. My question is, would you put two different tires on your car? Is it a bad idea? Did I make a mistake in buying the 8000? Can you really notice the different tread patterns if you are standing behind the car? Thanks in advance.