Crocodiles anatomy is rather primitive: their limbs protrude out of their bodies almost parallel to the ground. This is due to the articulation of the limb with the pelvis/shoulder.

To have a bipedal posture like birds one has to have limbs getting perpendicular to the ground. With a limited mobility in the shoulder, is also more difficult to move the wings. (Picture source)

So, I think there is no escape from the path of first improving shoulder/pelvis joints to allow bipedal posture. Convergent evolution would give birds roughly the same appearance.

Would an avian crocodylomorph have certain and noticeable anatomical differences from avian dinosaurs that I should watch out for? Or would an avian crocodylomorph look exactly like an avian dinosaur?

Well, we don't have an actual example fitting your question, but we have a lot of examples which fit the same concept: would different species achieving the same complex function (flying in this case) have the same form?

This is what we call convergent evolution, and we can see for examples in dolphins or sea urchins. They definitely are not sharks nor descend from sharks, nevertheless they have evolved to have a very close resemblance. Their body is hydrodynamic, they have fins, so they look much more similar to sharks than to other mammals.

But of course if we dive a bit deeper we can see anatomical differences between sharks and water mammals. The breathing system is one, for example.

So, to answer your question, I would say that yes, there would be some differences, but you might have to carefully look for them.

Crocodiles anatomy is rather primitive: their limbs protrude out of their bodies almost parallel to the ground. This is due to the articulation of the limb with the pelvis/shoulder.

To have a bipedal posture like birds one has to have limbs getting perpendicular to the ground. With a limited mobility in the shoulder, is also more difficult to move the wings.

So, I think there is no escape from the path of first improving shoulder/pelvis joints to allow bipedal posture. Convergent evolution would give birds roughly the same appearance.

Crocodiles anatomy is rather primitive: their limbs protrude out of their bodies almost parallel to the ground. This is due to the articulation of the limb with the pelvis/shoulder.

To have a bipedal posture like birds one has to have limbs getting perpendicular to the ground. With a limited mobility in the shoulder, is also more difficult to move the wings. (Picture source)

So, I think there is no escape from the path of first improving shoulder/pelvis joints to allow bipedal posture. Convergent evolution would give birds roughly the same appearance.