I’m 6ft and demo’d both, the large was a barge, the medium was borderline, compared to something like cannondale they felt at least one size bigger (small spesh enduro = medium cannondale prophet) and at least 2 sizes bigger than commencal (medium prophet = large meta 5.5). The spesh definately felt the most stable of the three like you had to make it do the work by countersteering on the entry to corners etc, whereas the prophet you could pick up and put down wherever you wanted it to be on the trail.
The smaller spesh didnt seem to gain the prophets chuckability though it just got cramped, whereas the larger ‘dale did gain the spesh’s stability, especialy in the slack setting.