I really liked the mini-T3 too, until I dropped it ONCE. Now it's dead (leaks like crazy and can't see the crack to fix it). The Vision VT is wonderful, and amazingly for a top-coil, you don't have to do the tilt and twirl thing to keep it working, and you can vape it down to the last drop of liquid in the 2ml tank (wick goes all the way down to the bottom). Doesn't get slurpy like the bottom-coil T3 either. Gonna replace the tube with a metal mini-Vivi Nova one for added durability (they're completely rebuildable).
But I've started liking the regular T3 too, once I started rebuilding my own heads (lower resistance, thicker wick). I've put in a suggestion for SI to offer lower-resistance heads, as they seem to work so much better on X2s. With the regular heads, I've been having to use them on my Spinner at higher voltage.