Please don't expect E80 styles to work perfectly in an E50/60, though. You will need to do quite a bit of work re-mapping the styles for sounds and drumkits that don't exist in your E50. Not to mention the 3 extra MFX effects sections, and a host of parameters that don't exist on the lower models (obviously!).
There is a little anecdotal evidence that perhaps there may be a little incompatibility between the two, at least on a few styles. We don't know yet whether this is just due to 'operator error' or whether there are elements of the style data that cause strange results in the E50. The Danish G70 site has more information, and might help you get a grip on this.
In the meantime, you might inquire of MidiSpot (who develop some of the E80 styles) whether E50/60 versions might become available......
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An arranger is just a tool. What matters is what you build with it..!