But ignoring that as best I can, how is this comic any different from this one?
Answer: While they both involve getting celebrities to voice someone's thoughts, the celebrities are of different races! Also the newer comic has a conveniently placed dick joke.
I would point out that this is the second comic in only the last 11 (11!) that references enlarging penises, and I would speculate as to what that suggests is preoccupying Randall's mind, I would, but I am, shall we say, a larger man than that.
PS - Jeremy Irons reminds me of a wonderful simpsons moment. Allison is a new girl who has joined Lisa's class and is even smarter than Lisa. At first happy to have someone at her level, then jealous of her, Lisa visits Allison at home. To quote from the good folks at the Power Plant:
Ah, comedy...Alison: It's great of you to come over, Lisa. I really want us to be
Lisa: You're a wonderful person.
Taylor: Hi, Lisa, I'm Alison's father, Professor Taylor. I've heard
great things about you.
Lisa: Oh, really? I --
Taylor: Oh, don't be modest. I'm glad we have someone who can join us
in our anagram game.
Alison: We take proper names and rearrange the letters to form a
description of that person.
Taylor: Like, er...oh, I don't know, uh...Alec Guinness.
Alison: [thinks] Genuine class.
Taylor: Ho ho, very good. All right, Lisa, um...Jeremy Irons.
Lisa: [looks with consternation] Jeremy's...iron.
Taylor: Mm hmm, well that's...very good...for a first try. You know
what? I have a ball. [pulls one from his pocket] Perhaps you'd
like to bounce it?