They came just as we were about to go out, so a real K/R with stylings will have to wait... but I could not help at least putting them on! TTS with room for socks built in. No need to size up.
My size 9s are 16" tall from back sole to top. about 18" from arch to top on the sides. So they are kinda tall. But with the V shape they do not interfere with my knees at all. DH says they look good, so I take that to mean they are not too tall for looks - will have to evaluate further myself.
I do like both versions. The chelsea boot looks totally good by itself, though again I want to see em with BF jeans etc.
They are fairly easy for me to put on, even with the tall shaft attached. The chelsea has an elastic opening so you don't have to take the tall part off to unzip the low boot or anything like that. High insteps may have to pull/shimmy more (can't remember what your instep is like).