one is, "AI will soon enough be AGI and then the extinction of humanity is at stake"
the other is sort of paraphrased in this article: "These models are being unleashed into the wild by corporations who offer no transparency as to their corpus, their architecture, their guardrails, or the policies for handling data from users. "
one refers to harm that would be caused by some hypothetical intelligence that so far only exists in science fiction, the other refers to harm being committed right now by humans who own companies.
The various "letters" being signed seem to be firmly in the "AGI human extinction" category and make no effort to suggest that perhaps the training sets being used for LLM should be *opened up right now and limited to those sources that provide consent only*, that is, stop stealing art, music, writing, source code, photographs, literature, and sticking it in your for-profit product. Skynet is not doing that, Sam Altman is.