IMO 2 colors are best The layout has some issues for me , I never want to crossin front of the range to go from frdige to sink. Why are you planning a second kitcehn , we need info. Post thta here in a comment DO NOT start another post.

No more than two color/stain limit

Oak and white, or oak and black.

These are the solid timber images I find. This wide will have to be glued and nailed because its solid. Engineered wouldn't need gluing.

The better way to compare different color surfaces is to get a good sized sample of each and look at them in your space with the lighting you'll be using and daylight. If you can post a picture of the samples next to each other we can offer evaluations. The off center sink is preferred to keep two people from bumping into each other. All drawer base cabs is a good choice.

This is the wood flooring unfinished.

Blanchon has finishes to keep it light and ultra matte. Blanchon Coatings Australia - Water & Oil Based Wood / Timber Floor Finishes Blanchon |Lacquers Do tests with Intensiv Invisible Effect and Bare Timber. Link. And Initial Link.

Boston Oak by Polytec

You'll have to make up samples to get the floor to match or coordinate with the cabinet wood finish.

Having a second kicthen upstairs as we have a living area and balcony with ocean veiws .
So will be a galley style kicthen

Is the main kitchen upstairs or downstairs?

Main kitchen is downstairs

Have two bedrooms upstairs bathroom and living areas as well

Why do you plan to have two kitchens?

How are you planning to use the two kitchens?

Why are you planning a 100K upstairs kitchen, as a 2nd kitchen? Why not just put in a dumbwaiter and a beverage fridge?

Ditch the white and replace with either the cinder (awesome!) or oak.