I believe we cannot say that a department chair’s job is more difficult than that of a college dean. Every job in university has its responsibilities and challenges. The most important thing is how to set priorities, and how to manage time at work.
I don't agree with this. Faculty Dean has more contacts than departmental head. Imagine a faculty with eight departments and whatever the HOD signs most of it will be endorsed by the Dean. Then, who gets more task ? The Dean.
The answer depends on the university and the persons with whom you work. If your "upline" lacks integrity, your job is much more difficult. Both jobs require a service mentality. The challenge, according to Peter Blcck (2013), is for a leader to choose "service over self-interest." That capability is, unfortunately, beyond the moral capacity of many individuals.
My Dean was HoD for over 20 years prior to becoming the dean. During my interview for the Department Chair job, he indicated that in our setting, a department chair's job is much more difficult than that of the Dean. All the faculty and student issues go to the Chair, and only those not resolved by the Chair rise up to the Associate Dean, only rarely do they go to the dean. The chair is primarily responsible for the annual evaluations, course assignments etc. With large faculty size (e.g. 24 faculty in my department), the jon becomes a lot more hectic. I agree with Cam Caldwell , it depends on the context.
It depend on the Defining the functions of the head of department and the dean of the faculty vary from one country to another. Sometimes the duties of the Dean are many and complex, exceeding the administrative function and overlap with the fields and functions of other functions. In other countries, the Head of the Department serves as Dean of the College administratively and scientifically.