How many hours have you shadowed a PA? How many hours have you shadowed a physician? Have you considered Assistant Anesthesiology Schools? Have you considered being a scribe within a hospital to get more of an evaluation of what the day to day is like?
What is your cGPA vs sGPA? How many hours of volunteering have you done? Have you or will you consider a research project with your degree? Have you considered the time and investment for the MCAT? Have you looked into the required Health Care Experience (HCE) and Other Health Care Experience (OHCE) hours that are mandated by specific schools within your state or region for the PA program (ie 1,000 hours vs 2,000 hours or 500 hours vs none needed)?
Would you be ok putting off family obligations and sacrificing the best years of your life for medical school + residency + possible fellowship specialties vs PA program and going right to work being under a physicians license? On the flip side, would you be ok being a 55 year old PA working under a newly licensed physician fresh off of residency? Are you concerned with a ceiling cap with medical diagnoses or are you ok taking on more liability with the multiple patients you visit on the daily?
These are just a few examples that you need to ponder when making this comparison. Based on your current information no one can really evaluate or suggest what would suit your personality and lifestyle. I've worked with both and many MDs wish they would've gone to PA school while many PAs went on to go to Med School. I would focus on the questions on here and try to answer them to the best of your ability. Both are great career choices for a specific group of people. Find out which group you think you belong in by volunteering, shadowing, and working amongst each profession.