yes theres a huge difference in my opinion, check out the before after pics of my car..
as for camber adjustment.. i would highly recommend it.. the wheels will tilt outward a little bit, and you'll notice it after the install. Plus if you align it, it will push out the rear tires more to make the stance a tad bit wider.
and heres a picture of my car with 20s with eibach drop after read camber alignment
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