No, same block. One's supercharged, one's turbocharged. The 1.6 THP was available as N/A, supercharged and turbocharged versions. Sure, if you swap the supercharged one with a turbocharged version you'll need a different intake and exhaust but engine size won't differ much and mounting points for engine and gearbox should be the same.
Was wrong, R53 has Tritec engine, thx @iDeFecZx