What affects whether a patch blends cleanly
Finish type matters first. Sand finish, dash, lace, smooth, skip-trowel, and custom hand-worked textures all respond differently to a new patch. The size and shape of the cut-out matter too. A tight, clean repair boundary is easier to blend than a ragged patch layered over loose surrounding material.
Color is the second part of the problem. Even if the texture is right, an older wall may have faded from Southern Utah sun exposure. That means a repair can be technically correct and still read differently until the surrounding surface is recoated or blended. Good estimate language should explain that upfront so there is no confusion about texture versus final color uniformity.