Wow - they are really quite different! For path tracing, if you set the hotpixel_removal to 0, and add some caustic_blur, you'll get much faster results. Despite the the increased emphasis on the direct lighting model, I still prefer the path tracing version. On path tracing I generally tweak the saturation (anywhere from 0.8 to 1.2), decrease the gamma to 0.8 and increase the exposure (to maybe 1.2) - that brings a bit more contract to the scene. And on path tracing, if you can get the speed from the hotpixel_removal and caustic_blur, it might be worth increasing the emissions for more contrast.