I have done 3 of these now as well as the POC enduro at Tweedlove 2 weekends ago.
The POC event was more serious, better organised and much tougher physically. Technically it was no tougher in fact probably a bit easier, certainly than the Quantocks Enduro 1
The Enduro 1 events have all been very different between the 3 venues. However physically none of them have been over demanding. ie if you are reasonably fit and can do a 3 – 4 hour steady ride fitness will not be a problem even in Comp class.
Technically
The FoD last year was not overly challenging. A competent trail center red run type rider would have been fine
The Tidworth event was a real mix. Couple of XC type sections and a couple of short proper DH runs with big jumps & drops (all with chicken runs)
The Quantocks was very technically challenging. Weather did not help but pretty much everyone found stages 3 and 4 very, very tough technically
All of the events have been great fun and very laid back 🙂
Not sure that helps?