First, if you like them equally, I agree do GTown EA then do ED2 JHU if that doesn’t work out. Make sure you have many backups at less-competitive entry schools in case neither works out.
Second, on your question of cut-throat: both schools are competitive and have highly intelligent students likely to make a very competitive environment to get a 3.7+ gpa to be in range for med school. Unless someone attended both, there is not way to know which one is more competitive. I have physician colleagues who attended each, and I attended Duke. All three schools were described by some classmates who did not have success getting in to med school as “cut throat”, yet we , as we had success, interpret each of our undergraduate premed experiences to be challenging yet collaborative. For students with excellent study habits and time management, who after they adjust to college find success in routinely being above the mean in weedout courses(A-/A ), finding like -minded peers to study with through the years will feel collaborative. Students who do not find success and are consistently below the mean in the core premed classes might naturally describe the environment as cut-throat, feeling as though the students with success are somehow keeping them out of it. Bottom line, it is all relative, and if you feel as though your personality would be better in a less competitive environment, then you should not choose GTown or JHU.