Being a gated community, Stone Canyon has private streets and there is no overnight parking on the street. I had heard they have security that comes by and enforces this nightly and that is a sore spot for some. The homes are fairly close together with small yards, but some have really nice views and the floor plans are nice.
It’s all in what is important to you. Personally, I would probably consider SEH over Stone simply because I don’t like all the rules & regs that come along with private streets (hassle for guests and deliveries, no overnight parking, yadda yadda), but again that is a judgement you’ll need to make for yourself. Other than that, it would probably depend upon the particular house on whether I thought SEH or Stone was a better choice.
You may also want to consider Sage Canyon on the north side of town, next to the cemetary. The homes appear to have been well constructed and the floor plan with the master downstairs (3500 sf or so) is particularly well liked by some.
I don’t own property in any of those developments but do have friends living in each.