Just thought I'd post this to stir up some posts....
There ARE some similar qualities in both bands:
Zep, early on--was accused of "bastardizing" the blues by adding celtic, arabic and indian musical influences into their mix. They simply did not know that "it wasn't to be done like that".
Spyro Gyra, as well, used to accused of bastardizing jazz. by adding rock, blues, rythym and blues, latin and other influences into the mix.
Eventually, the critics "caught up" to Zep's genius.
And it's nice to see the same happening to Spyro Gyra.
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"Jazz-since it`s inception-has been fusion"-Jay Beckenstein