Exactly. Hulk was as mad as a hornet by this time in the fight, and couldn't budge Superman. If Supes wanted he could have squashed Hulk like a little green bug
By all means, let's use a random panel from a comic book taken out of context to support our argument that Superman is stronger.
This is not a random panel. It comes from the joint venture of DC and Marvel in the treasury sized battle between Superman and Hulk. It is quite in context. Hulk knocked Supes around a bit until Supes had enough, stood his ground and let Hulk do his best while he simply stood there. Clearly, in that first telling between the two companies, they believed Superman was by far stronger than Hulk
Everyone knows Marvel and DC team ups exist in some far flung alternate time line. So, the point is moot.