I have Silestone which is a nice white.

Cabinets are Artic White which is a bright white

What is your led light warmth?

Immhaving the same white quartz dilema now. im looking at muse, giza and god knows what else right now.

Have you looked at frosty carrina by caesarstone? the honed finish looks even more white than polished. I think Empira White is the whitest they have. I think Ikea carries Frosty Carrina as "white marble look" if thats an option for you.

You can't pick stone from a small sample. Go to the stone yard and choose your slab.

Cabinets:
Oxford White

Cambria Brittania

Walls:
Simply White

The two whites are way off. If you are set on Oxford White for Cabinets, you need a correlating white with gray/blue undertones and not the creamy of Simply White.

B.M. Horizon

Then choose a quartz closer to the color of the cabinets...Oxford White.

You must see the full slab and you must sign off on your choice. Do not go by tiny sample. It does not represent the slab that will be in your house.

Very good idea …pick a slab you love …then pick a white you like …. that goes with it …