@ciscler Not Very worse, but worse. With four plots - The miner seeks to plot one, reads some nonces, seeks to plot 2 reads some nonce, seeks to plot 3, reads some nonces, seeks to plot 4, reads some nonces, seeks back to plot 1, reads some nonces ..... vs Single large plot: Seek to first scoop, consecutively read all the scoops for this round.
Seek operation are hugely expensive in time - just doing one and then contiguously reading is so much more efficient/effective.