This is a fascinating guide to the quality of different full-canvas suits, published in 1949 by the U.S. government. It also has a guide to fabrics on pages 6-7. Fused suits make no appearance in this volume. You can read the book here:
Some interesting observations: hand-made buttonholes are often identified today by their rough appearance on the non-facing side. The guide points out that the best hand-made buttonholes should be finished smoothly on both sides (doubling the work and expense for the tailor).
Not all canvases are made the same:
The quality of a coat front: