I think too the tone arm the cartridge is bolted onto is a consideration. Perhaps one with less friction in it’s bearings can enable the cartridge to track at lower VTF than one with slightly higher friction. Cartridge manufactures may specify a tracking force range in acknowledgement of that reality.
Why do cartridge manufacturers give a range for VTF?
My Sussurros' manual says 1.8 - 2.2 grams. I know that Lyra, particularly the Delos has it rated at a very specific number. Just wondering, It would seem that the stated range would be very narrow.