IMHO, Rossi's partner came up with the idea for the SK reactor and may have built it. It does not make sense for Rossi to make the QX reactor redundant. My sense is that the new partner is taking over a major part of the engineering that is going on in Rossi's shop. Rossi seems to be working at the partner's facility where SK development is occurring.
If you clear your mind of the "Rossi has working product" meme that currently infects it, then it makes every sense for Rossi to abandon the QX, just as he has abandoned the e-cat, the hot-cat, etc, etc. The old technologies have no value since they do not, as IH found to their cost, work.
And as any new partner will eventually discover, the new technologies do not work either if Rossi runs to form, and I would be very very surprised if he did not.