I have no injuries and own both the SB and the OmeGa. Thing is, while I love the fact that the OmeGa is purely mechanical and easily serviceable, it can wear on your thumb. In fact, until I got my P18, I had built up and oddly shaped callous on my thumb from depressing the OmeGa. Both are phenomenal devices and while similar in size, the slight concave shape of the OmeGa and the slightly smaller profile make it seem even smaller.
For ease of use though, I'd say the SB. For longevity and ease of service, I'd say the OmeGa. For vaping beyond.....
The Super T P18, the Reo Grande, or the Ali'i....
Haven't tried a GG yet.