Rh 25. More use case (handheld/helmet/clip on), Lightner, newer tech, customer support, rechargeable batteries... the works.
Also, the field of views are pretty close. 14.8⁰ for the LWTS and 17.5⁰ for the RH25. This means that the LWTS will support a tiny but more day time mag, but has an inferior res display (which helps the RH25 bridge that gap).
I will say though, using it with a 4x elcan is decent....but won't give you the best image because it lacks the back end demag necessary to help cut out that pixelation. Same goes for the LWTS/UTM X/voodoo s and so forth (which are all roughly 15⁰ FOV and 1x thermals.) The voodoo starts to pixelate out at 3x optical, so the RH25 will as well (and maybe even a little more). Is it still usable? Yes. Is it the ideal image if that's what you're going for? No. An LPVO is better suited for units like this.