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Never pick a sample just from a showroom visit ... the colors will look completely different in your space. Borrow those large samples and take them home for 24 hours. You will quickly be able to narrow down your choices.

i agree you need to see those in your space with your light etc

Also, your cabinets will be on a vertical not horizontal plane so the color will look different if you rotate the sample 90 degrees.

Well. What is your FLOORING? .................YES. A VERY IMPORTANT QUESTION. Are you building, remodeling......etc. Posting the actual kitchen plan can be a good idea as well.

We need more information about your home. And your goal. (All white? White with subtle gray elements?)

Be aware that samples can change color! I think the first could work, but you need to see the actual slab.

Showroom samples are a good way to narrow down ideas but they may not be accurate.

You want to find a white that is pretty close to the brightness of your cabinets, otherwise it looks dirty. Another consideration is the backsplash.

Different whites can clash and conflict with other whites with different undertones. I would look at a contrasting
counter and backsplash color (solid or veined) that works with the cabinet color….there is so much to choose from!

Bring samples home and live with the samples next to your cabinet paint / floors / backsplash/ walls etc. we have white countertops (silestone calacutta gold) with white (BM simply white) cabinets — I thought the white would compete but they don’t at all despite the white being more creamy.