In short there are many advantages.  Here are a few.  First,  Pavers are rated at a minumum of 8000 psi and the Belgard pavers are rated at 9000 psi.  This is about 4 times stronger than concrete.  A typical sidewalk is only 2500 psi.  Second,  Pavers have a very low fade rate.  This means that pavers will maintain their color.  Whereas,  concrete will fade and discolor which results in a “bleached” artificial look.  Third,  Pavers are much less of a maintenance issue.  If you have a stained paver section or a root upheaving from below, one can simply remove the pavers and fix the problem below the surface and replace the pavers.. You cannot do this with concrete.  Lastly,  pavers do not crack.  The reason is because pavers have “joints”and are installed in pieces.  On the other hand,  Concrete will always crack and dis-color.