It's not so much scale that makes Hercules loom bigger it's his more blocky look as Kup pointed out, his bulkier body makes him look bigger and aesthetically different to Crossfire and Giant.

I'm not to concerned anyway about the scale and all that. While I would like him to be in scale with my existing toys getting to fixated on scale with transforming toys can only lead to disappointment. So I'll judge this product by its own merits. And most important for me will be can the toys stand on their own as individual toys.