sweet modeling job there.
i like the colored one better. has more detail imo w/ colors and such.
the brushing of the "flames" shooting out the back of the object should have some more detail on it... looks like it was done too quickly.
the atmosphere around it looks good though.
overall, it's nice.. just don't like that brushing bit there... looks wrong.
I dig the colored version more. It looks nice, simple and clean. Quality manipulations Just a tad plan, seems like more could be done. And I don't think the brushing fits in, the 'flames' from the 'turbines'