I felt like more than the theme was common. The first panel and second panel are quite similar in that that both use "puke" as their term of choice over vomit, throw-up, hurl, spew, etc. In the first panel, both cats are stationary and making their statement about needing to puke. In the second panel, both cats are in motion while making a statement about needing to be in motion.

In the final panel of this comic and the final 2 of the one I linked, both cat's make a statement of relief of having "made it" in time to throw up. The joke is the same, and is delivered almost identically, except the other comic delivers it better by splitting the last pane up into 2 in order to reveal the location.

The largest difference I see here is that the comic in this thread cuts out the additional work of having 3 extra panels without the text.

The theme, choice of words, and when those words are spoken in these comics align.

Furthermore, this has nothing to do with myself, I have no idea why you would say "get over yourself" when I am not talking about me. I can only assume you chose to say that to be intentionally inflammatory.

If you are that offended by me seeing more similarities between two comics than yourself, then I have no idea what to tell you.