BaristaFIRE is specifically about switching to a part-time gig that's theoretically easier than your current job. Becoming a barista at Starbucks is sort of the classic example, but a lot of people would argue that's not actually that easy of a job and might be more stressful than a desk job sometimes.

That sort of move isn't necessarily part of a CoastFIRE plan. With CoastFIRE, you're just on cruise control with your current job, knowing even if you don't save anymore you'll still be on track to retire at your desired age.