There are many facets to this. From a great height they are roughly simular, but in the details they differ. For example, the Mill is a belt machine and each

There are many facets to this. From a great height they are roughly simular, but in the details they differ. For example, the Mill is a belt machine and each stack frame has its own belt and the hardware takes care of spilling in-flights across calls to any depth. Also, the Mill loads are orthogonal to cache management and we offer immunity to aliasing and false sharing.