If the cam was removed from the engine (I see it is not), then it would be prudent to measure the lobe heights.
Yesterday I measured the cam lobes on a TR6 engine and though the lobe surfaces look decent, there was a significant amount of wear, such that the lobe lift differed by about .025 from one lobe to another.
With the cam in the engine, if you have access to a dial indicator, a depth micrometer, or a vernier caliper, it is possible to measure lobe lift wear. Keep in mind you can't just compare overall height of the lobe: you need to measure the difference between base circle (the bottom side of the lobe) and the nose of the lobe.
Both exhaust lobes and intake lobes could be worn, so the comparison could be meaningless.
But if you note a significant difference between one exhaust (or intake lobe) to the other, you need a new cam.
Regardless of the condition of the lobe itself.