As mentioned in just about every Kobo vs Kindle comparisons review that I've done, one of the biggest differences with Kobo's software is they offer more font choices and font sizes, with a custom boldness slider, and they offer more layout tools and you can
sideload TTF and OTF fonts.
Not exact matches
You can also
sideload your own
TTF and OFT fonts by placing them in a «fonts» folder on the Kobo drive.
You can also
sideload your own
TTF and OFT fonts by placing them in a folder titled «fonts» on the Kobo drive, but you can't adjust weight with
sideloaded fonts.
A lot of ereaders support
sideloaded fonts so you can can just add any OTF or
TTF fonts to a folder and get the option to use them while reading an ebook.