The MPL requires 240 hours total, spilt between AC and SIM. A typical course will have at least 100 hours of simulator flying. This broadly matches what a regular CPL Cadet will have flown, but with double the emphasis on multi pilot operations. Hence why airlines consider it a better 'product'.
Basically, take your average CPL, take away 50 hours of unsupervised Cessna 'hour building' and instead give them an extra 50 hours of multi crew SIM flying to airline SOPs (on top of their type rating). Are they a worse Cessna pilot or are they significantly better equipped to fly a jet?