I always preferred the 57, it has a magic that the 63 lacks.
The 57 may have perfect tone or maybe a bit more nuance it is hard to say but they seem to have a more palpable presence.
I always felt the 63 may be more 'neutral' but maybe in a subtractive sense so a less musical effect.
The 57 may have perfect tone or maybe a bit more nuance it is hard to say but they seem to have a more palpable presence.
I always felt the 63 may be more 'neutral' but maybe in a subtractive sense so a less musical effect.