I've been carrying Sebenzas for about 9 years. Have handled a few SnG's, but do not actually own any Strider folders. I do own several Strider fixed blades, so am familiar with use of their products in general, steel, geometry, yada.
The Strider folders have come a looong way in terms of quality, but they are still nowhere near as nicely fit as the CRK's.
For a normal-use EDC cutting tool, I would definitely choose the Sebenza - small for discretion, large for longevity of sharpness. The SnG/SmF platform is built more around the idea of heavier use, for which I would favor a fixed blade.
Should point out that there are basically no restrictions on my carrying a fixed blade of that size, and that is certainly not true for everyone.
If you're basing a decision primarily on pleasure of ownership, then obviously you'll get whatever appeals to you, practicality be damned. If you just want a reliable pocket knife, that can be had for less than half the cost of either the Sebenza or the SnG. So in either case I think there is a little bit of guy-thing factor in there.
On the issue of S30V heat treating, I will say that I have been very impressed with keenness and edge retention in the Sebenza. There is definitely a noticeable difference between it and CRKs BG. Relative to INFI, the CRK S30V is more of a micro-chipper than a roller, but its still pretty easy to maintain on a strop as long as you dont let it get away from you.
Honestly, I think the combination of Busse fixed blades and CRK folders is pretty hard to beat; and those are the knives I mostly carry and use.