George II halfpennies and farthings are notorious for blocked dies. They used them until there was virtually no relief remaining. It is not a case of soft striking imo as you often see a well struck side paired with a weak other side. e.g, here are two examples of the 1738 V/S in GEORGIVS obverse die. Nicholson's is on the left, my current example on the right. There is only one die, so any wear or die fill confirms the chronological order in which individual examples were struck. The case for die fill is helped by the profile of the weak areas in the head, which are concave on the coin (and not flat, thus eliminating wear). The Nicholson coin which is the earlier example, has more wear, so allow for this. Apart from the hair detail, the Nicholson coin is also marginally stronger in the legend.