Are Monoblocks better than Multi-channeled amps??

Yes, assuming each units specs are in fact equal. The thing that gives the monoblocks an edge is that they are separate power supplies so each channels load does not impact the other, a problem when a single unit is used.

Typically, when a manufacture produces mono blocks they will use higher level components and beefier power supplies etc. Everything is built to a price point, and mono blocks are generally the manufactures statement product.