Wouldn't want another steel personally. Rowens 1095 seems to have the perfect heat treat, it is the toughest per width blade steel I've used yet, my rc3 has had 30 to 40 degrees of deflection in the middle of the blade while batoning to no ill effect. I have never seen another knife of that thinness do that. The edge retention is also great even with the toothy edge I keep on it, beats out a few of the s30v knives I have it seems.
1095 has been used in traditional folders up to a very high hardness and still works well with great retention, but isn't very forgiving, but neither are most steels at high hardness.
I doubt the toughness would be there if they switched steels for some reason, and that is the entire point of a survival knife. These just happen to have great edge retention too! Something izula size and thickness in m4 would be interesting to see though, as that is another very tough steel with good retention.
There are plenty of smallish fixed blades out there, alot of bird and trout knives would qualify, and are occasionally made is o1 and w2 or some stainless (never liked stainless steels, as very very few are done well enough to have the toughness and retention of carbon)