I ride all of them on my bikes and they feel very similar. A well used Zen is still my favourite. The only thing that bothers me a little with the aarn is that its a little thicker, so its not perfectly even on SG75 cranks. But thats kinda nonsense^^
So does that mean they fit alright on Omniums then? I've noticed a lot of chainrings have the opposite problem on Omnium cranks, where the chainring is too narrow for the chunky flats on Omniums.
I ride all of them on my bikes and they feel very similar. A well used Zen is still my favourite. The only thing that bothers me a little with the aarn is that its a little thicker, so its not perfectly even on SG75 cranks. But thats kinda nonsense^^