There are no differences in dial texture for the gen Spectre and standard model. I know my watches. I've handled both gen models and trust me when I say that the watches of both the Spectre and standard model is the same. Same dial texture, cut out indices, case size, case thickness, weight, everything is the same. Only difference is the lollipop hand, large omega logo and the bidirectional gmt bezel of the Spectre that makes it different with the standard model.
Both genuine models of the Spectre and the standard model side by side. They're identical other than the differences mentioned above such as lollipop hand etc.