Your comparison tests don't end when you place the order. The real data comes from your customers. Encourage reviews, monitor social media mentions, and keep a simple spreadsheet of common issues. Over time, you'll build a mental database of what works and what doesn't.

For more on what to check before you stock a device, see our guide on choosing disposable vapes for retail staff. And if you're comparing coil types, don't miss our mesh coils vs standard coils breakdown.

Remember: you're not just selling a product—you're selling the confidence that it'll work. That's what your comparison tests deliver.