The User's Review: Minolta Maxxum 50 mm 1.4 and 1.7 Prime Lenses, the Fist Version in the First Generation

I have these 1.4 and 1.7 lenses side by side. However, I can not tell which one is which one by their side view.

Both of them are in the version of so-called crossed/Exxon X, and actually are the same as the later version except the X thing.