I thought you got her face more 'right' when it wasn't touched up with wrinkles.
I personally think as well, that Granny has quite a pretty face and softer eyes, but its a face thats used to wearing an adopted scowl if you follow. I always think of the Kidby picture with her shaking the bee out of her ear as being as close to Granny as I see her.
I like the one on the right better too. I also think the wrinkles are wrong. I'm thinking about trying making them thinner and shading them with a darker tan to see if that looks better.
I didn't want to make her skin too dark because she strikes me as a fair-skinned person (lives in a shady environment, spends a lot of time out at night, wears a lot of clothing and a wide-brimmed hat).
Granny Weatherwax must be about the most difficult choice to characterise than I can think of. We know much more about her on the inside than her outward appearance. An idea might be to imagine which actress could play her in a film but no one comes to mind right now. I always see her as a taller version of my grandma who had blue eyes and perfect skin. When I was a child she wore her hair drawn severely back in a bun but it was beautiful white hair and I recall watching mesmerised one day as she dressed it one morning. She had an inner serenity and stood no nonsense, I cannot recall ever trying her boundaries. She inspired devotion and was the strongest woman I'll ever know. She knew how to have fun though!
Granny Weatherwax has her soft side......the white kitten.....'meep?' She's the kind of woman animals know instinctively is 'safe'.
Not much help am I? i wouldn't mind having a go at drawing her though.