Thanks for that.
I checked the voltages of both of the eventide power supplies with a meter and noticed that the Factor power supply puts out 12VDC and the new H9 one is only 9VDC.
If I power both the H9 and the TF with 12VDC then they both sound pretty much identical. It shouldn't take too much tweaking to get them the same.
The new H9 power supplies are nice, small and light but powering them with 12V sounds way better at least with my setup. More headroom.