Forget the spec sheet. When comparing vapes for your brand, use this checklist instead:

1. Flavor consistency: 3 units, same flavor, same batch—do they taste identical? Then try another batch.
2. Airflow feel: Is the draw tight or airy? Does it change as the battery drains? Customers notice.
3. Battery life in real use: Use the timed test above, not the advertised mAh.
4. Build quality: Press the mouthpiece, check the seams. Does it feel solid or creaky?
5. Leak resistance: Leave a unit on its side overnight. Any e-liquid on the table? That's a return waiting to happen.
6. Screen usefulness: If it has a screen, is it easy to read in daylight? Does it drain battery fast?

This checklist is short on purpose. You can run it in an afternoon with three units per brand. It'll tell you more than any spec sheet ever will.