Garrard 301 and 401's are pretty much in a different league and priced accordingly. Garrard had it's heyday in the sixties, Dual in the seventies, for the most part.
I've always liked Duals, but as brought out above, the sleds can be kind of finicky and the steurpimple

can wear out creating issues. There are a few guys around that can make them right though and for what they are, they are a good turntable. I currently have a 1218 but I've had a 1009, 1219, 1215, and 1228 over the years. Stay away from Duals older than the 1009 as parts are very hard to come by.
Garrards had a much wider range and were available for a longer period than Duals. In the fifties, they were probably the most common, good, turntable around although today those are probably best used as a 78 changer. I've had a few and they were not overly difficult to get going nicely but the arm tracks a little heavy, in that vintage, nearly everything did. I currently have a Garrard Lab 80 which I like very much. Perfect example of mid sixties British engineering with all it's good and bad points. Very decent arm considering it's vintage. I've also had an older model A, which is decent, if not a little clunky. SL series Garrards are good, the 95 being the creme of that crop. Certain models can suffer from motor issues although I'm not sure if it's overly common. I think the Zero 100 looks cool, but just too much going on with that arm. Garrards, after the early seventies, pretty much deteriorated into cheap junk.
Again my opinion, others may feel differently. Most any decent Asian turntable from the seventies, is as good or better than some Duals and most Garrards though. If one wanted a good Dual, look for a 1219 or 1229, Garrard, a Lab 80 although the SL95 is a pretty good table also. If price doesn't matter then a 301 or 401 would be a no brainer.