I have done both and I feel online is harder. I think it is because they cram a whole semester into 5 weeks, and the fact that you never see anyone is hard. I like the online better because of my health I was missing to much school. Online can go with me anywhere even the hospital, and I am never behind.
if you have a hard time motivating yourself, yes.
What I have done online was easier for me, as I tend to learn on my own anyway, so a teacher was never that much help.