At box surfaces there is a fair bit of difference in shape, but overall hook potentials are very similar. At matched surfaces the Axiom is still slightly cleaner and quicker, but much closer to the Helios. So if you keep them at different surfaces and have more of an eye for shape rather than different amounts of hook, they'd fit into the same bag. If you need different hook potentials, the Helios is slightly stronger but I would still say overlap.