> If you don't make a habit of taking either, what actually performs better?

Tylenol/acetaminophen is good for fever which NSAIDs won't help. Otherwise, take both and alternate their dosing times for better pain coverage.

For non-habitual pain relief, combinations outperform either in isolation. Studies show a significant effect, and anecdotally for me it's often the difference between dampening and outright curing a headache. Combo pills are widely available in most countries (branded as Advil Dual Action and Motrin Dual Action in the US), but they're pretty new so consumer awareness isn't yet super high.

Depends what you’re taking it for. Generally people take NSAIDs for muscle and dental pain, or anything that’s obviously inflammation, and paracetamol for anything else, particularly headaches, and is a common adjunct treatment if you have a cold or flu.