warning: I’m really salty and I’m just expressing my opinion 
I’ve read so many INK stories that now I think that INK characters look the same, not the other way around 
I mean, almost EVERY girl in INK has either beach waves or straight hair (sometimes diva curls), upturned feline/upturned bold eyes and round thick/classic lips and an elven nose. INK girls in a nutshell haha
for guys, pompadour/spiky-ish hair, button nose (99% of cases), smirk/uneven mouth and defined triangle face (studded for older misters). have I mentioned that they (almost) always have blue eyes?
yes, there are characters with different details as the one stated above, but these are the most common ones I’ve seen. have you seen a lot of dudes with manbuns in INK? omg manbuns are so underrated I love them nope. unless it’s a bad boy! yeah, everyone loooves bad boys
as for LL, I think there’s more diversity. have you seen how many skin tones are out there? we even have blue and green skin tones. blue and green. yeah. also, more mouth colors!
not to mention that LL has a variety of hair colors AND actually brown colors. INK’s chestnut brown is pretty sad actually, I would consider it red.
yes, yes, LL guys have baby faces and may look similar for now but I hope freckles/beards will be implemented soon!
but meh, I guess INK is better if you want your story to contain a lot of outfits 