Why additional G3s might have been more useful than N3s

Would building more G3s have been more useful than proceeding with the N3 battleships?

Probably for many operations, though a faster N3 that retained its armor and heavy guns offered a useful compromise.

Additional G3s would probably have offered more operational flexibility than the planned N3s. The G3's speed made it easier to work with cruisers and carriers. The N3 concentrated more weight in armor and 18-inch guns, accepting a much slower fleet speed. A preferred compromise keeps the N3's protection but raises machinery power enough to approach 28 knots rather than choosing either extreme unchanged.