embudo - hmmm. I have R2ed the upper taos box but I think embudo would be harder for sure.
I guess technically the Embudo is "harder" that the upper box, but the upper box scares me more than the embudo. The box is full of sieves and I think is actually more technical. Embudo is mostly big run the meat right down the middle rapids, no pause super-duper continuous. Most of the time you can just keep it straigt and paddle hard. If you flip it could be a very long swim, but at least you won't get stuffed in a sieve. For sure the lower gorge on the embudo would be epic in a raft, not saying it's not runnable, but epic for sure.