Is it really established that Gannji (he does all the thinking, Enor just follows his orders) does his bounty hunting without regards to whether his mark deserves it? We only seen them capture Elan, whom they believed to be Nale, and his associates. And Nale actually did all those things like trason, conspiracy and murder (Malack's "children"). Other than that, we seen Gannji refusing an idea of a fraud and siding with Amun-Zora and Ian, and being speciesist/classicist towards mammals.

Hilgya, on the other hand, is perfectly okay with attempt murder of hapless innocent person, casually using lethal force because being pissed, and commiting frauds using magic. Much more Evil in my book, even though there are certainly many other characters in the comic south of her.