A stone board is not a wooden board in a heavier material
The knife loses. Kitchen knife steel is softer than the quartz crystal in an engineered slab, softer than most granites and softer than sintered stone, so a blade drawn across any of them gives up its edge rather than marking the stone. That is the same reason cutting straight on a stone worktop is hard on knives, and a board made of the same stone does not change the physics.
So we are plain about what a stone board is good for. It is a serving board that looks like the kitchen it came from, a cheese or charcuterie board that stays cool, a pastry and chocolate slab, and, in granite or sintered stone, somewhere to put a hot pan down. It will take chopping too, as long as you accept that your knives will want sharpening sooner.
Where it earns its place is the match. A board cut from the offcut of your own worktop is the same slab, the same batch and the same pattern, which no shop-bought board can be. That only works if it is asked for before the job, while the offcut still exists.
Cut and finished in our own workshop. The timing, and how the piece reaches you, are set out on your quote.