I have been to Kinnerton once before and visited the round stone in its field, but didn’t know about the second stone tucked into the verge to the north of the field gate. I only find this now thanks to Postie’s pictures – it’s very overgrown and nettles sting me in my efforts to clear it sufficiently to photograph.
As has been commented by others, the stone in the field mirrors the conical top of The Whimble, visible to the west from here.
There is very little resemblance to the shape of this stone and that of Whimble.
It's in the eye of the beholder, obviously. Looked like a pretty straight optical matching of conical tops to me and other TMA visitors, but it's only a visual impression not scientifically measured angles. I guess you either see it or you don't, we all look at these monuments in our own way.