couple of important corrections: MPP can be used by any chain! x402 also supports fiat! Assets - MPP supports crypto and fiat - x402 supports crypto and fiat Scale - MPP's sessions primitive lets agents authenticate once, set a spending limit, and settle later, batching payments across many interactions. Better for agent scale. - x402 is still largely per-request, although it’s moving toward prepaid flows Settlement - MPP can settle in any chain - x402 can settle in any chain What's better? right now looks like MPP has an advantage with its sessions primitive, but x402 is working on the same. so what other significant differences are there?