Are all synthetic stocks much heavier than their wooden counterparts?

If just bought a Staffordshire Synthetic Stocks stock(that was a mouthful!) for my air rifle and though a very nice piece of kit and steady on aim, it aint alf heavy mum! Got me thinking whether it's the same the world over, as I've always coveted a synthetic stocked rifle, but my 595 has a wooden stock, and looks very nice in it too.

Are laminate stocks any better?