I did the C42 in 2004 and back then I thought the K78 shirts look a lot nicer.
I also think that back then the C42 was the same course as the 'new course' this year. The extra 12k compared to the K30 aren't very inspiring. In recent years it went further downhill to Tiefencastel, but now it seems to go back up to Berguen, which was a long hike over a steep gravel path, followed by a 2k down and up into a valley to get the added 2k.
I did the K42 in 2010 and found it really hard. But I was too heavy back then, which didn't help. There were some changes to it since, when I ran it there was a down and up in the K42 which wasn't in the K78. This seem to have been taken out now.
If I would run a marathon again, I would do the K42. It is the nicer event, and it has more cudos to it. Very photogenic as well. All the C42 has to give is the bridge at Wiesen, but that you can get with the 30k.
This year I am doing some proper training and all I want to do is beating the 14 hours cut-off for the K78. My hope is that I run well downhill, even if tired. So if I get to 50k, the next bit is walking terain anyway, then I could manage to 'roll' back into the valley.
The shirt is nice and I want one.
