Justin made the below comment on Knifeforum:

Quote:
The S7 strength will be more noticable when you get into big blades and doing a ton of heavy chopping. S7 is extreamly tough and will take the beating like nobodies business. The 5160 can take a great beating but will chip before the S7 will. Other than that the are pretty close in terms of performance. Hope that helps.

That sounds about right.