Read the press release; check out the configurator and specs on the Lexus website; and test drive the current model lx600. That’ll bring your answer.
After getting the allocation I read through everything now available on the Lexus website, compared what specs they do have, but much like for the GX OT, it's a lot of frilly marketing filler, especially when it comes to off-roading. Info from this thread, people digging into the real tech specs, and aftermarket vendors chiming in about real off-road potential are much appreciated and why Mud is so valuable and special.
I wasn't sure how different the 600 and the 700 will be, so avoided test driving the 600 to this point. Unfortunately, I don't think anybody else has that answer yet either. All the videos I could find are static sitting on display. I got my GX a few months after the first allocations showed up, but at least there were videos of people test driving them about a month before they were scheduled to hit the US, comparing old vs. new, etc. Did see that yet, and hoping to see that sooner than later, but please let me know if I'm wrong.