Moreover, the main reason why they amended the date of this tapestry to earlier than the other is precisely the fashion. In almost all cases you'll be looking at something pre-1430.
For those who haven't read it yet or forgot, what I wrote (based on a set of images we extended from JKP's collection), the type of sleeves of the VM archer is found ca. 1400-1430. If you cross-check this with the type of sleeves of the women (Virgo and Gemini), the same period comes to the fore.
Early examples are found in northern Italy, with only, as far as I know, the De Grassi works pre-dating 1400.
Like Rene says, I like to present these things in a visual way. A cool example I used is the Phebus manuscripts. The one on the left is a bit pre-1400 and very close to the author. The one on the right is the same scene, but updated to the high fashion of 1407.
It's actually wonderful that we are presented with fashion quirks that can be dated to two or three decades.