Finn Juhl never had anything to do with the Great Dane group, at least not in any literature I have. It is a complicated story.
The Great Dane / Grand Danois series is composed of models 127 & 128 and 167 & 168, and the companion table here, 622. Now models 127 & 128 are slightly revised (early 1960s) versions of 117 & 118, and _those_ models were designed by Grete Jalk. When the revision happened and the Great Dane group was created, they lost the credit to Grete Jalk and became advertised as Charles France designs. Models 167 & 168 have one published design credit, in a retailer catalog, to Grete Jalk. It is unclear whether this was a mistake or actual truth. The other credits are also to Charles France. So that is the complicated story of the design history of the Great Dane seating.
As to the coffee table, it is completely unclear who designed it. It could be completely a Charles France design. Grete Jalk is the outside designer with the most connection to the group, so she is an obvious candidate. Finn Juhl did work for Charles France, so it is not utterly absurd to consider his name in here, but there is absolutely no documentary evidence for it. Aesthetically it is possible to argue that the floating table top with brass standoffs has precedents in Finn Juhl's earlier designs. By the same token, Finn Juhl was a very influential designer, so it is not a very persuasive point.
Yes that is the same detail as on the top of the legs of the Great Dane seating. The Grete Jalk designs that preceded models 127 & 128 had a different detail there: a conceded domed top. So that is a Charles France detail. You could build an argument on this fact that this coffee table is entirely Charles France.
One thing I think we can say for certain is that it will take a new discovery on vintage documentation to say anything much further. And I would not be surprised if vintage documentation did confirm Charles France as the designer.
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