This isn't remotely close to true. That Intel Mesh is a single on die cpu protocol, infinity fabric is a coherent go anywhere interconnect. It's design is monumentally different to that mesh. It's both clock and power adaptive and designed to connect literally any part of a system and any two chips together. It can be routed over pci-e, throughout a single chip, connect multiple chips on one package, connect two sockets together, etc.
Intel's mesh isn't designed for literally any of that except connection local cores together on one die. When one core needs to speak to another core on another die it uses a completely different interconnect to reach it. Their dual die chip that is supposed to be available this year, doesn't use the mesh to talk across dies on the same package either. There are a million different interconnects that both companies have. The range, scope and designed use is really what you would use to compare interconnects, the mesh Intel use on a single die is entirely incomparable to infinity fabric which is primarily used as an off die interconnect.
