I found Linear for volume pots and Logarithmic for tone. If I tried Log types in the volume position, the volume came nearly all the way up between about 1- 3 and little other difference after that and these were good quality CTS pots.
I gather that a good Log pot has a ratio around the centre of about 60:40. At least a linear was close at 50:50 around the centre detent.
The human ear does track volume increase in a logarithmic fashion, but that fact alone does not guarantee that the resistance sweep on the pot is tracking at exactly the right ratio for the human ear.
If in doubt, I would get the ones from Feline Guitars, as they have been tried and tested, despite seemingly contrary opinions on this post.
:D