Call VPI. They are intimately familiar with both of them, have heard them with a variety of cartridges, and are the best people to know the differences. I always found them very reliable in their assessments. I have a Superscout with rim drive and love it.
Can't go wrong with either but I would skip the rim drive for now, it needs work as reports are surfacing on vibrations being pick up by the chartridges. Could be a problem specific to MC's but wait until it shakes out. I have the Aries.
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