The Crypto industry is now, by far, the #1 political donor in the USA. It surpasses Big Oil, Big Pharma, and all of the others.
As such, I think the short answer to this question is:
Which one will make CoinBase and Binance more money?

The Clarity Act is being held up in the Senate because Democrats are demanding that politicians be banned from trading in crypto while in office, and they want that to include Trump--and Trump has vowed to veto any bill that will constrain his, um, side ventures...
The CFTC seems to be the industry's preference right now, but that's only because the CFTC is much smaller in terms of personnel, so the industry believes there will be less enforcement if it's the CFTC rather than the SEC.
Folks, as an American who has been around for a while, I can see the usual pattern playing out:
1. The industry lobbies Congress to deregulate itself to the point where anything goes.
2. Millions of average Americans get ripped off, lose their savings, etc.
3. Congress responds to the popular backlash and regulates the living shit out of said industry.
Then, after 10-20 years go by, the cycle repeats...