First of all, in my time in the digital design world, you're the first person I've ever run into to argue that the SoC and SiP nomenclatures are different enough to disqualify one from comparison to the other. But if we're really going to argue over semantics, then the A4 is both a SoC and a SiP chip. The Cortex-A8 is a SoC for exact same reasons the snapdragon is. The CPU core has many intrinsic functions that used to be on separate chips in a system. Fine, they're both SoC's. The thing is, after that, the A4 goes a step further and binds that with other silicon substrates to make it a SiP chip as well. So it's both, it's neither, it's whatever, but it is better*. Call Tiger Woods black, call him asian, it doesn't matter, he's still better. And gets more white women. *(until something new comes out)