I'm not sure what those colors are because the one called Grey Oak doesn't look gray at all. Does it look more gray in person? The floors in the room you show are very warm, so the best I can tell you is to choose the warmer color. The top one looks warmer, but that may just be the lighting. If RH will send you a wood sample so you can see it at home that would be best. If there is an extra piece of flooring you could take the store that would work too (when we moved we found a partial box of flooring in the basement that wasn't used when the floors were installed). I will warn you that the lighting in showrooms rarely resembles what you have at home, so try to always look at colors in daylight. If you are planning on getting a rug that might help mitigate any warm/cool conflict, but it is tricky to try to get warm and cool colors to go together.

Thanks for your comment. it helps a lot!

I’ve checked the wood swatch from RH, and decided to get a grey walnut.

and then I found the same wood top from outlet, but it looked totally different.

It wasn’t even similar to the picture on webpage.

The first one is grey walnut picture, and when I checked it in person, it was like the attached photo. It doesn’t look like gray at all.

Have you checked in your area for a craftsman to make a similar table? IMO, RH is not worth the money. (Search discussions here for complaints about the finish.)

Look on FB or Etsy, or just google.

Or even look on FB for a used one.