I don't know if you can say one is better than the other - they are different.
Which is healthier, an orange or a bowl of oatmeal? too different to really compare.
You can do both - fermented feed with fodder for snacks.
I wonder if you are growing it too long and it is actually developing a mold or the enzymes in root area are not rinsing out completely and the animals are picking that up.
Try feeding it sooner - my chickens go nuts for alfalfa sprouts and sprouted wheat. I feed when when the seeds have...