While there are distinct differences in the topologies of these amplifiers, the actual execution of the design is very important to the result.
It is very hard to say that a SET will be better than a push-pull, unless you have some indication that they are both quality examples of those designs. A poorly made SET may not be better than a good push-pull amp.
That being said, the speakers will define the need for power, and the more efficient speaker designs will generally require less power to give similar SPL. The K-horns are efficient and don't need alot of power. A good SET should do well on them.
On an ultimate scale, I think that an excellent SET can sound as good as it gets, as long as the match with the speaker is correct. If you select a bad matchup, then it is not the amplifier's fault or the speaker's fault.
It is very hard to say that a SET will be better than a push-pull, unless you have some indication that they are both quality examples of those designs. A poorly made SET may not be better than a good push-pull amp.
That being said, the speakers will define the need for power, and the more efficient speaker designs will generally require less power to give similar SPL. The K-horns are efficient and don't need alot of power. A good SET should do well on them.
On an ultimate scale, I think that an excellent SET can sound as good as it gets, as long as the match with the speaker is correct. If you select a bad matchup, then it is not the amplifier's fault or the speaker's fault.