Sierra Forest should be pretty much the same SoC as Granite Rapids, just substituting a Redwood Cove core for a Crestmont (?) module. So yes, that looks to mean the mesh, though fewer die to die hops should help vs SPR.
Aren't they moving the IO part to a tile with SF?
So it'd be a 6x6 CPU tile with the 4 cores per spot. And then the IO tile.

