As so many games were ported from the "inferior" Spectrum, the Amstrad range could hardly benefit from its main advantage.
Quite disapointing, when you are the happy possessor of a "powerfull" Amstrad CPC 6128...with a fast disc drive and 2x64Ko of Ram, a good colour palette of 27 shades... to get a games designed for a cassette 48Ko almost mono-colour computer, and not that compatible in fact... As a result, so many games were slowler, painfully animated, with a bad gameplay...AND had badly ported graphics too.
*C64 had better sounds, scrollings and Sprites capabilities.