For me, the
reuleaux feels more comfortable gripping it as well, even though it is wider AND thicker than the i100 TC (but shorter) because of the more rounded form factor. However, the
reuleaux is not very pocketable whereas the i100 TC is. It is smaller than a pack of cigarettes, and except for the weight being a dual battery mod, it would easily fit inside a shirt pocket.
The only thing I don't really like is how you have to change the wattage when in TC mode (which I've detailed earlier). If you hold the buttons down too long, then the adjustment flies and it is very easy to overshoot your desired wattage. This means you have to "pulse" the buttons to adjust the power bit by bit and having to watch the screen flash back and forth.
If they had a toggle to switch between changing temp and changing wattage, like the
reuleaux RX200 has with 4 clicks of the fire button, the Snow Wolf has with long pressing the up and down buttons, or the Cuboid and evic VTC Mini has with 3 clicks of the fire button, it would be much easier.
Having to hold the button combo down and wait for it to toggle through the different wire modes, while slow, isn't that big of a deal. Although in an ideal world, it would have a "setting" screen like the Reuleaux and the evic VTC Mini where you can quickly toggle through the different modes.