You can get soft carbon and stiff glass (especially low resin rod). The hollow carbon tips can be bent alarmingly before any breakage. Given, carbon is more springy. But when being pulled forward 1oz test curve is 1oz test curve no matter the material. Taper would be another thing entirely. Lots of fast taper tips get broken towards the tip eye (between tip eye and 1st intermediate) because the space or gap is too big.