There's not much difference is the 3 patterns you list in your first post. The extra stitch on the end of heel 1 gives you a bit neater edge. I like the ssk over the sl1, k1, psso because, for me it's less obvious.
I always learn so much about socks here, I love it! It's fun to try the different heel patterns or sock directions and it keeps the knitting exciting. How about these
for heels (as beautifully knit by auburnchick here