A: The V3 offers impressive switch activation, advanced airflow, and 2g capability. The V4 is a more moderen era with even more precision and battery enhancements. Grapefruit Lemon: Although this may not be probably quite possibly the most sour taste though in the Geek Bar Boutiq switch V3 lineup, https://bookmarkingdepot.com/story20471045/boutique-switch-fundamentals-explained