If you want the best bass performance in your room, a pair of either of these subs, with both properly positioned, will outperform one of the Tekton 4-10 subs.
Probably. But probably not by as much as most "one vs two" comparisons.
The reason I think so is because the Tekton 4-10 subwoofer does to some extent take advantage of the main principle of distributed bass array, which is the multiple location of subs. Reading through all the literature before building mine I recall one of the main guys saying widely separated random locations is best, but that you would get some benefit even with four stacked right on top of each other. In essence that is what Tekton has done. Four subs, just placed very close together. Not as good as four spread out and optimally located, but still a whole lot better than the one 18 incher that everyone will compare them to.
Another option is utilizing 2 Tekton 4-10 subs which might look twice as cool and sound twice as good as just one but they’d cost $1,600.
Bingo! And why stop there??! Four Tekton 4-10 subs at $3200 would be exactly what the Swarm four 10" subs with one Dayton amp costs, and only a little bit more than my four DIY subs with two Dayton amps. Hard to believe this would not blow away mine, which according to Duke just looking at what I built told me its better than a Swarm. (Duke is nothing if not open and frank and honest to a fault!)
Haven't heard any Tekton speakers yet myself. Kind of jealous of those who have. Because from everything I have been able to glean they are #1 top of the very short list when (if) I get around to upgrading my Talon Khorus. Four of these would be awesome!