The S&F was designed specificly as a killing tool not for general purpose use, and as such I beleive it is the best of it's type for this :2c: it is still issued in the UK.
The downside is that you still need to carry a GP knife.
Yes, I understand that. So, was the FSSF knife and for that type of 'dagger' knife I prefer it over the the UK's issue S&F.
IMO, it's hard to beat the Randall model #1 for both a fighting knife and a GP knife in the field. There is also a 'dagger' Model #2, for those that like that type. IMO this one corrects some of the weak points of the S&F. (Blade breaks off in body.)
http://www.randallknives.com/catalog.php?action=modeldetail&id=29