[count-your-change]

It might, it might not. But since neither has produced useful energy (or will in the foreseeable future) it's a bit difficult to think of efficiency.

[monocle]

The LENR processes have produced excess energies for long enough periods to be utilized by known techniques, however inefficient. With high energy fusion many technical problems would have to be addressed to utilize the excess energy. Materials would be a major technical hurdle.