Since no-one has come forward a week after your post I'll give my 5 cents worth.
I used to own a Thorens TD124ll at the same time as I owned a Linn Sondek LP 12. This was from about 1976 to 1980. On several occasions I switched the arms between decks. The Linn flowed more. That elusive pace, rhythm and timing. The Thorens was a little more dynamic. That's what idler wheel drives do better than any other propulsion system.
I've heard both a 301 and 401 in different systems. They both sounded excellent. Both the Thorens and the Garrards are rim drive turntables. You can find a wealth of information on the Garrards on the Loricraft website. Loricraft is now the official manufacturer of Garrard turntables. They now make a 501 and 601.
You should most definitely check out the 'Building High end Turtables at Home Despot' forum on this siet which touts the virtues of the Goldring Lenco turntables. These are idler wheel drives with the wheel driving the underside of the very heavy platter - not the rim. Does this make difference ?
I think so, enough to sell my very heavily modified Linn and go for a Goldring Lenco 75.