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sound will be the same if both are catless dp
build quality should be fairly equivalent as well
pricing would depends on where you buy from and if you can get a good deal, I have remember seeing AA going on discount once at around 1200
the main thing is the need to modify or leave off heat shield, to my knowledge, AA requires the leave off the lower part of the heat shield or as AR requires heat shield cutting or trimming to fit properly
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