To be perfectly honest, for all the Seat Leon has been getting a slating. It looks better in 5 door than the Golf, more coupe-esque.
Thats because Seat shamelessly ripped of the design for the backdoor handles from Alfa Romeo 
Same designer worked on both, Walter De'Silva. Or worked for both comapnies. He was poached from Alfa.
"In 1998 he was poached from Alfa by Ferdinand Piëch to work for the Volkswagen Group's SEAT division with the hope he could inject the same verve and sportiness to SEAT design. The result was SEAT's 'auto emoción' philosophy which saw more expressive design in the form of the 2001 SEAT Tango Concept, 2002 SEAT Ibiza and SEAT Córdoba. In March 2002 he was appointed Head of Design to the now-defunct Audi brand group encompassing design for the Audi, Lamborghini, and SEAT brands."
"Following the appointment of the former Audi chairman Martin Winterkorn as the chairman of the Volkswagen Group in January 2007, de'Silva has been promoted to Head of Design for the entire Volkswagen Group effective of February 2007 and is now responsible for the overall strategic direction of all VW brands encompassing Audi, Bentley, Bugatti, Lamborghini, SEAT, Skoda and Volkswagen. "