Hi,
I didn't say anything on your Spyderco thread, since I thought it better that other people answer your question. Since you are still looking, I thought I would post some pros and cons here.
Handle Ergonomics:
So I designed the Spyderco and have four of them (2 wood protos, a first run wood and a current G10). I have carried and used one of the first prototypes and it is still my go-to for a Scandi knife. In the long saga that lead up to Spyderco producing their Bushcraft model, before Spyderco were involved, we approached Bark River about a BCUK forum knife. The knives that they offer now are far better and more suitable than the ones they offered back then. Their ideas of design have moved on a long way. Despite this, based on all the Bark Rivers that I have handled and all the pictures of current product, I am willing to bet that the Spyderco still has a better and more comfortable handle shape. In addition to my own thoughts, I have had strangers from far away lands come up to me at Blade Show and tell me that out of all the bushcraft knives they own, the Spyderco is the most comfortable to use.
The Spyderco has a wider handle than is usual on knives made with man-made materials. Most knives, and this goes for all the Bark Rivers I have seen (may not apply to all, but is sure to for their Bushcraft) use 3/8" or thinner handle material. That is the standard thickness that Micarta comes in. This limits what can be done in the way of sculpting a handle. Bark River also shape their handles on belt sanders, while Spyderco's manufacturer uses CNC milling. This appears to limit what can be done for shaping by BRKT.
Blade Steel
Clearly O1 is not CPM-3V. The former will be easier to sharpen, and will work on any water or oil stone or wet and dry, while the latter will be slower and tend to demand diamond or ceramic. I am not a fan of high carbide content steel for blades with a lot of bevel. Some people don't mind the extra sharpening work, but I do. The BRKT convex helps in this regard, but it is a bit shorter than I would like, I would like the design more if the grind went to the spine. Which blade is "better" will come down to your preferences, both will work, and both can be made to carve and feather sticks. The Spyderco might be biased a little more to wood work while the Bark River leans a little more towards general purpose. If I was going to be skinning game I would like the 3V over the O1.
Handle Material
If you search, the Bark River could offer a choice, but I am going to assume you will go for Micarta as the easiest to get option. Micarta is fundamentally a grippier material when wet, but the G10 isn't really slick, not as slick as I expected, or as slick as some polished stabilised wood I have used. The shape also helps with a good grip since there is a slight flare at the front of the grip. Micarta is also lighter weight, compared to G10.
Dimensions/weights
Despite what Heinnie says, the Spyderco does not have a 4mm thick blade. It is speced at 3.6mm. The G10 though does put the weight higher than the BRKT, 221g vs 188g.