Complex sentence: With its set neck and maple-capped mahogany body, the Nighthawk was structurally and aesthetically a Gibson, but certain key aspects of its design took it into Fender territory.
Split into simpler sentences: With its set neck and maple-on-mahogany body, the Nighthawk was still structurally and aesthetically a Gibson. But certain key aspects of the Nighthawk design took it into Fender territory.