Can you be more specific? An MD working in clinical practice and an MBA working in the business world have completely different day-to-day responsibilities, work environments, coworkers, etc. I suppose they are similar in that both may be working an intense work environment that is almost never "9-5", but pays well, is intelectually challenging, etc, but these are very broad generalizations. Just within clinical medicine you will see a wide range of work types, schedules, pay, etc. A person with an MBA, which is a general degree, can be working in any industry, at any level.
Now if you were wondering something like....what is the difference between a mid-level Academic Emergency Medicine attending in the Northeast and a mid-level consultant/manager at a management consulting firm....it is much easier to make comparisons about work type, schedule, pay, career options, work environment, etc.