Difference between doctor-bag (Mastermind) and first-aid-kit (Fugative)?

Solution 1:

Doctor Bags reset how many times you went down and bring you to full health. First Aid Kits give back small amounts of health but will not reset the number of times you went down (3 times).

Solution 2:

As an addendum:

• Bring Doctor Bags if you know you're going to have to camp at a certain objective for a while. For example, Day 2 on Hoxton Breakout. Since you will need to anticipate your allies going down, having a Doctor Bag will help prevent them from being taken into custody too many times

• Bring First Aid Kits if you know you'll be mobile. Such as on Hoxton Breakout Day 1, since you'll be moving all the time to objectives, you don't have to "leave" a medic bag behind since the first aid kits are one-time use and can be put pretty much anywhere.