Now that the price of a sigelei TeleZmax V3 has come down quite a bit I think it is safe to say that it is close enough in price to the Vamo that the two could most likely be on the same prospective shopping list for consideration. The Vamo is still larger but both can be adjusted to a smaller size, Zmax V3 by way of telescoping and Vamo by way of removing the extension sleeve. I would probably give the Zmax V3 a slight advantage as it will fit an 18500/490 where the Vamo is limited to 18650 and 18350. They both have nice OLED screens, but then the Zmax V3 has the single button for navigation and the Vamo has three, that being a matter of preference. If you haven't used both here are a couple links to articles on both, Zmaz V3 article & Vamo article, they both have photos and user instructions so you can compare menu features. Another plus for the Zmax V3 is that it is offered in two completely different body styles, certainly a first that I can think of ...