symbols and beats, quick clarification needed

okay, i am trying to determine which is the fastes way to send a 192 bit wide datastream from a receiver => dual clock fifo => to sdram using dma.

setup 1: using mm interfaces and 2x fifo and DMA, and splitting the stream into one 64 bit wide and one 128 bit wide "channel".

setup 2: using ST interfaces and configuring one fifo and one sgdma for (x bits pr symbol)*(y symbols pr beat) = 192 datawidth.