Don't trust the checklist—prove it. Here's a week-long plan that will surface the real differences between brands:

• Day 1: Buy 3 units of the same flavor from each brand. Vape one fully using the timed method. Note flavor and draw.
• Day 2: Vape the second unit, but this time, drop it a few times, leave it in a hot car for an hour. See if it leaks or tastes burnt.
• Day 3: Let the third unit sit unused for a day. Then vape it. Does the first puff taste stale?
• Day 4–6: Alternate between brands, noting which one you reach for more. That's a gut check on real-world appeal.
• Day 7: Compare notes. Which brand passed the practical tests? Which one failed on the little things?

This test doesn't require lab equipment or spreadsheets. It's the same kind of comparison you'd run on a new phone—except the stakes are customer trust, not just personal preference.