Be advised—while the memory (amount and bandwidth) are definitely increased, the CPU is a bit more complicated/mixed. The base numbers of cores from M3 to M4 have changed. And this is a “triple” binned version (one disabled/defective core of each type, and that is not counting the GPU that is also binned but that last remains the same number from last year). So compared with the M3, the M4 has one fewer performance core (three) and one more efficiency core (five). The M3 was four and four, I believe. This might mean that in some edge cases, the M3 iPad Air might be faster. I doubt very much most people or workloads would see this, though. More than anything, this might tell us a little bit about chip yields for that generation of Apple Silicon.