Those two photos were not shot under similar conditions. The DL photo was a press photo taken by Disney on a tripod after-hours while the attraction was down and show lighting could be altered for optimal documentation. The WDW photo was taken by a guest from a moving Doombuggy this morning while the attraction was operating. I don't say that to diss the WDW photo at all, they're just not the same kind of picture.
People are reading way too much into how the lighting looks on camera - lighting registers differently in different cameras, lenses, settings, and circumstances. The small smattering of pictures taken this morning alone shows how widely the results can vary from device to device.
Reports say it looks good in person and isn't too bright. Given how finely calibrated the light needs to be for this effect to work, I would say it's fair to trust that.