The OP did say it was a belt drive vs. idler drive choice do I think he got the model numbers correct. The fact that they were being offered st comparable prices is a bit surprising; I would expect the Garrard 401 to cost a lot more.
The 401 is comparable in sound quality to Garrard’s iconic 301 model, and some say it has a better motor. The 301 is being bought back by the company that holds the Garrard and SME name which re-conditions the table using newly manufactured parts where needed. This “301 Advanced” model is paired with a top SME tonearm and re-sold at something like $65,000 dollars. The 401 may not be as collectible, but it is right up there with the 301 and Thorens 124 in sound quality. Of course, arm quality is important too and all of these tables deserve very high quality arms. Most of them have older arms that are not as suited to modern cartridges so a change may be something to look into if that is the case.