I chose the K5 over the v3 because the v3 was only 19mm in diameter (I wish they had kept it 22mm and just made it shorter), and it was lacking the little tabs next the the post screws....I'm kinda challenged when it come to setting the coil on the deck so those little tabs are priceless to me.
They without a doubt are very helpful, those posts. Having authentics of both i know where you are coming from, they both have their disadvantages & advantages in my personal case. The 5 is no question easier to build, with myself specifically i just found that the MTL experience on the 5 (even with mtl reducers in) did not come close to matching the quality of mini v3 MTL vape.
However i feel that the v5 would appeal to more people, generally speaking. Adj airflow and the bigger capacity make the v5 more able to compete in the market these days, with the bajillion tanks available.
It just didnt work for me. If you find the v5 too loose, a metal tank can extend the mini v3 to 3.6ml or even 4.2 respectively, so then all it boiled down to for me was sacrificing those little posts, which i can live with (But at the same time really wish i didnt have to!)
If you like an airy-er draw, no question the v5 is for you. You could always get the mtl reducers if you felt inclined.
So you can see that after doing alot of searching & comparing they definitely both have situations where one would be preferred over the other, i dont think you could simply call one better than the other, just personal preference. They are too different to try and compare them head to head.
And i feel weird saying that, because back in the day i could say without hesitation "yes the lite plus is better than the 3.1 or regular lite 100%."
The v5 is really a new thing for svoemesto, and while i might not be a fan, i think they did it pretty well