Your impression alone really tempts me to get this hahaThe bass is superb on the F7U. It goes deeper than the F7, you can feel it more on certain tracks. It's fast and tight with a good hit, it gives the monitor a great foundation to work on. As I mentioned before, it follows the way tracks are mixed so won't add more bass to everything. It's a stunning IEM that ticks all boxes and can work with pretty much everything.
I've been told musicteck might have a demo ready within a few weeks, which I'll try to get my hands on and then decide.
I primarily listen to electronic music, so bass is quite important to me. I've personally preferred good quality BA bass over dynamic driver bass from personal experience.