I can answer myself; it looks like the fasttech KF3.1 has a proprietary drip tip and it not 510-driptip friendly. Also, it has a polycarbonate tank whereas the one I posted above it SS.
I'm starting to think that the one I posted above is possibly the EHPro, although it normally retails around $59.99. Hmm.
I'm starting to think that the one I posted above is possibly the EHPro, although it normally retails around $59.99. Hmm.