I think you could get them to sound very close to each other in terms of their broad tonal signature, but the devil's in the details, which show up as those little narrowband wiggles in the FR plot. For the most part that stuff is simply not amenable to correction via EQ. The Utopia and Clear may be similar, but the drivers are made of different materials, they probably differ in the finer points of their driver/enclosure design. Some driver distortion mode may very well show up in an FR, but you can't really fix it without fixing the driver - at best you could reduce whatever frequency excites that distortion, thereby probably doing more damage to the sound.