In case it's useful for somebody, I found La Bella low tension flats (LTF) to be slightly less compliant than TI Jazz flats, have less mids, but get much closer to that classic vintage tone. They were more compliant than D'Addario Chromes and Fender flats (I've never had the guts to try the classic La Bella's).
I like both LTFs and TI Jazz flats.
LTFs on the Precision.
TI Jazz on most other things (including fretless) apart from a couple of fretted that still have round wounds.
Phil