10 at Kirroughtree is a more fun course but I think 10UTB is a better course for solo.
10@KT a great course for riding because you’re either climbing or descending on singletrack so little respite and with the exception of the last descent there aren’t really any long climbs or descents on the course, also nowhere you can ease off and eat or drink for a minute or two. There’s almost too much singletrack for a solo endurance event, they could spare some for SITS or Mayhem 😛 I found it harder to pace myself and make sure I was eating and drinking enough because it’s just good riding all the time.
10UTB is better for a solo effort – it’s got a better “vibe” partly because the entry is bigger and partly because I guess it’s No Fuss homeland! The course is largely a bit of down, one long climb, one long descent with a sharp climb in the middle and a gradual climb back to the start – longer segments suit me better I think. Also got some level forest road for whacking a banana/ energy bar/ gel/ rock of crack to keep you going.
For a team I’d say definitely 10@KT – solo it’s really hard to call, fortunately I’m planning on doing both this year again!