Ouch ewh that hurt! I'm a checker, at least I’m doing the job just don’t have the qualifications, experience or, interestingly enough, the pay.
Kevin, From general perception of what I've seen so far.
Drafter/Designer are often used interchangeably. Generally implies no Bachelors, sometimes no formal engineering type education, just maybe CAD or drafting classes.
While it varies, to use the title Engineer usually implies you have at least a bachelors in Engineering. In some industries you have to pretty much be PE (CEng to you Kevin) to use the title Engineer.
From what I’ve seen Engineers in the US have more of a superiority complex than in the UK. Designers/Drafters have more of an inferiority complex.
Back in the UK at my place whoever could do the job did it, if you didn’t know how you learned. In the US it seems at least some people will say “I’m only a designer I can’t do that” or “I’m an Engineer I’m not going to do that”.
Plus side I have a bachelors, so get to be an Engineer, the others in my department don’t and they treat me like I’m better than them sometimes. Actually I’m not sure it’s a ‘Plus’, weird when people older than you , with more relevant experience etc defer to your judgment!
Please note, these observations are based on limited data points!
KENAT, probably the least qualified checker you'll ever meet...