I'd say the two races are fairly similar; terrain, time, distance, climbing all being much a muchness. I can't see why someone would enjoy Langdale and not Three Shires.
Don't get cragfast on the climb up Wetherlam - if you try being too clever in cutting off the corner to reach the summit it can get a bit steep!
When decending down Wet Side Edge, don't forget to turn off left down to the Three Shires stone. Follow a trod rather than the main path down to the stone.
Don't forget to double back on yourself off Blisco summit a la Langdale, but remember not to continue down the Red Gill route...
Flagged from summit of Lingmoor to the finish.
WARNING!!! There is now a "2-person at a time" posted on the bridge which is around 100yards from the start. That should thin the field out somewhat...