mcshot,
My Bushmaster is slightly purple when coated with CLP and in the right light. My friends Colt (with detachable carry handle) has a very purple lower in any light, and its carry handle is also purple. Fit and finish are the same. They shoot the same, as far as we can tell (we shoot High Power and local Palma matches, never off the bench). We got our rifles within a month of each other. The only differences (that I can see) are: 1) cost (Bushy is cheeper), 2) color (Colt is more purple), and 3) pin size (Bushy is mil spec pin size, Colt isn't). My opinion: why spend more for a funny pin size?
I was of the impression Armalite made their own parts. I don't care for the muzzle brake Armalite puts on its "standard" models. Their "target" models have non-lined bores, which no doubt helps accuracy relative to the Bushmaster V-match line, which uses chrome-lined bores. The only non-lined Bushy is the DCM.
BigG,
SP-1s are not winning Highpower competitions. Not unless they are rebuilt with heavy fast twist stainless or chrome moly barrels (with a name like Kreiger on them), and properly free-floated. Oh, and with fully adjustable rear sights, with 1/2 moa or 1/4 moa adjustments. I suppose a good rifleman could win a local reduced (100 or 200 yard) match with a stock SP-1.