Well I guess Mr. Foster's experience with the 130gr Fusion differs from yours. I don't find it hard to believe that a Fusion would perform better on heavy bone than the relatively soft-nosed Partition. I also didn't see where he said that the Fusion is on par with the TSX. If anything, he says the contrary.
Personally, my only experience with Partitions has been the .243/6mm 100gr. On heavy bone, they have not performed all that well. Quite recently, for example, a family member shot a quite large mule deer buck with them. The first shot struck the upper leg bone, near the shoulder, and broke it. The bullet did not carry on into the chest cavity. I can only conclude that the soft front immediately disintegrated on the bone, thus shedding all the energy and half the weight of the bullet. I can conclude this because 2 other bullets were recovered from the animal and both had very little of the front portion remaining. Neither of them had encountered bone in their paths. I did not recover the first bullet. I suspect it fell from the arm-pit onto the ground during a long, rough drag.
Not an apples to apples comparison, but I recently shot a mule deer buck in nearly the same place with a .277" 150gr SST. It blasted through the front leg bone, through ribs of the lower chest, and came to rest just under the hide of the opposite front leg. About 40% of the projectile remained (I didn't weigh it). The deer died within 20 seconds. Obviously, the .270 has a considerable energy advantage over the .243. I am not saying the SST is better than the Partition. I did expect the Partition to perform better than it did, though, and I realize that I would have been better off with a stouter bullet for that particular shot - such as a TSX or one of the premium bonded bullets.
Silly comments about man crushes aside, I have already said I am not married to one projectile or another. I do read Nathan's pages, but that is not the only source of info that I consider and I am paying attention to people's advice around here, too. I did take Nathan's advice on the SST and so far they are really working out for me. They are affordable, the load I developed shoots extremely well from my rifle, and they have been killing game very reliably so far. That's really all I am saying. If that somehow bothers people here, then I don't think that's my problem.