DBZ characters are potentially THE STRONGEST fictional characters created, outside of gods themselves.
Hell, DBZ characters in their own universe are strong enough to kill their gods.
Raditz at a power level of like 1,000 could destroy Earth.
Frieza at a power level of 1,000,000 could blow up planet Vageta and Namek with 1 finger.
SSJ 4 Gogeta probably has a power level well over 6,000,000,000 (6 billion). Considering the amount of damage that this, at full power could do, is unthinkable. To try to grasp it, a quasar is the power of 1 trillion suns or 1,000,000,000,000. This is probably the destructive power Gogeta has, enough to wipe out an entire galaxy.
The 9 tailed beast isn't enough to wipe out an entire nation, seeing it was defeated/captured a few times.
The 10 tailed beast was stopped by a single person, the sage of six-paths.
Regular Goku at the beginning of DBZ could probably go toe-to-toe with Naruto as he is of the current Shippuden chapter, although that'd be a fair fight.
Comparing the two worlds, or DBZ power-levels to any other manga/anime outside of the ineffable abilities of an omnipotent God is pointless.
Edit: Oh and as far as Genjutsus go, watch DBZ World's Strongest or the fight versus Captain Ginyu (mind-body switch). This is still at the beginning of the series. DBZ characters could literally just power up and will themselves out of a situation. Especially Goku with his retarded levels of determination.