Like Apollo and Soyouz, those knives are different but got connections.
Both are Spyderco folders with no hump, no choils, both equipped with compression locks, nested liners, spoon clips and radical blade designs.

Both are made to be carried as EDC. Not too big but not too small with a blade around 3 inches / 9 cm.
Their looks are reflecting their designer’s minds and crafts. Ray Mears is a teacher in bushcraft and Michael Janich is a teacher in martial blade craft.

Both are best carried tip up and you need to pull on their tails to unsheath them. They leave a similar print in and especially out the pocket.
Also both got a consequent integral guards. Only the Yo2 got its guard double with a nested liner though.

The main difference is the way their respective blades are ground.
A scandi grind against a saber hollow ground: the Yin and the Yang of cutting perfs.
Eventually the Yo2 is much easier to get sharp as you got less material to remove. But the Wolfspyder scandi’s once sharp is a pleasure on wood works for very precise controlled cuts. In that area, the Yo2 is more like a wild hungry edge waiting for a firm hand to stay on the course.
The thick point of the Wolfspyder is made to withstand drilling in hard wood.
The shard of the Yojimbo’s point is designed for deep penetrating thrusts… to the bone.

But in the end of the day, both knives are very pleasant EDC companions. Their ultra solid locks make them safe to use hard with no after thought. I was surprised how they can be adapted to mondaine chores with their own characters. Both got great ergonomics improved by a wide guard. The compression locks are not hurting my hand like on my Paramillies and the absence of jimping and hump is a plus in my book when you need to extend your thumb on the back of the blade for power cuts.