do 6581ARs sound very different to 'normal' 6581s?

[Mr modnaR]

i pick up 3 6581AR SIDs off ebay, and than managed to wangle another SID in it's original home (C64). the last one is not an AR though. i was wondering if it's going to sound out of place in a 4CORE 4SID synth?

thanks in advance.