While it may not be easy to determine the one that is more difficult, it is to be noted that determination most times, may make both on-page and off-page simpler. On-page includes some activities that can be controlled from your end. Activities like choosing the right keywords, optimizing the contents for ranking and others. This means it is somehow easy.
Off-page includes the activities that are hinged on external factors. This means it may be somehow difficult if compared with on-page. What's your take?
Off-page includes the activities that are hinged on external factors. This means it may be somehow difficult if compared with on-page. What's your take?