I'll jump in with the first answer to my own question.
I'm not the inkastare for the Kubbchucks so I don't have much to say about the Kubbs. I could hit them just as well as any other Kubb with a baton, which is to say only sort of well. :-) When I did work with them they felt fine and I don't know that I would have been able to tell the difference between the MadWood kubb and an Old Time Games kubb. But, I'll leave the detailed answer on the kubbs to the Inkastares.
Pins (err, Stakes)
I'm not a fan of the wide "yard stake" style that MadWood includes in their sets. I though that Eric and team did a great job making sure they were lined up properly on the pitch, but I much prefer a smaller, round dowel style like Old Time Games uses. This isn't just aesthetics. The stakes that MadWood uses are much, much harder to get in the ground. In fact, in our fifth match at Dallas one of the corner stakes kept falling down and I could not get it to stay in the ground or go into the ground any further.
Okay, the MadWood batons did not make me a happy camper. Overall, the MadWood batons show no fit and finish to them. It appears as if someone just took a big dowel and cut it into proper length.
In general I found the MadWood batons to be notably heavier than the Old Time Games batons. That wouldn't be a terrible thing (although I found them all generally much heavier than I prefer), but they also had a wide variance! There were a few batons that just felt crazy heavy to me and I always tried to not throw them.
The biggest problem I found with the batons is the lack of a slight bevel on the edges. The Old Time Games batons have a very small bevel/finish on the edges. The MadWood ones were a sharp edge, and in fact some had small splints of wood still from the cutting. We started referring to batons getting "MadWooded" when they would hit on one of these sharp edges and just die. I left Dallas feeling that Old Time Games batons would have behaved very differently on the hard pitches than the MadWood ones did.
I noted at least three batons that were warped. If I rolled them on a flat surface there was nearly a half-centimeter warp to them.
You can chalk all of the above up to being picky, which it is. But I would expect better consistency, fit and finish and quality control on competition grade batons.