I can’t tell if it was meant to be derisive or self-deprecating, so unless someone can decisively identify which, I assume it’s the latter. The “difference” between the two of them being that they were both long-term employees in the household (the MC having become the chief bodyguard), but the butler has lasted long enough to become an old man because he closed his heart off entirely, unlike the MC who finally couldn’t hold back anymore.
Somehow it has vibes of Transporter 2 (bodyguard for the kid of an ignorant idiot) and working man. Am even reading this in a gravelly English accent. Too bad its oneshot tho