Galaxy S24 Ultra's built-in UFS flash memory read speed can reach 2.5GB/s, while iPhone 15 Pro Max lags significantly behind. In JazzDiskBench, sakitech showed that the Galaxy S24 Ultra's sequential read speed was 2547MB/s, while the iPhone 15 Pro Max's throughput was 1450MB/s, a 75% difference between the two.
Unfortunately, in the write test, the Galaxy S24 Ultra couldn't replicate the same performance gap, with its data transfer speed of 1442MB/s and the competitor not far behind at 1257MB/s, a gap of only 15%.
Samsung has historically used faster flash memory chips in its high-end smartphones, so it's no surprise that the Galaxy S24 Ultra outperforms the iPhone 15 Pro Max. We also saw a similar situation in the 4K random read and write test, which begs the question, why does Apple insist on using the slower NVMe standard?
But it's not just faster sequential or random read and write speeds that determine the performance of a smartphone or desktop. Latency is also a metric worth considering. Here again, the Galaxy S24 Ultra wins, achieving lower latency than the iPhone 15 Pro Max, as this test shows how fast specific data can be accessed. In theory, this means that the Galaxy S24 Ultra can open apps faster, but this also depends on how optimized Samsung's OneUI software is.
Both phones were tested with 256GB of internal storage, so results may differ when using higher-memory versions in the same test.