Bruce, I believe you have it reversed and that I was originally right...
as I thought fastcamo's post shows.

H13 is a more dramatic example than s7, and as you can see it is VERY tough... but not very strong.
that's how s7 sr77 is.
sr101 has more strength, but less toughness.

If Jerry has said different, I'm thinking it was a mistake or mix up, unless he meant that SR's aren't as strong laterally... because they're softer at the spine? (which would make it "weaker")