No offense, but your understanding of how Bitcoin works is quite incorrect. There aren't publicly accessible "mining nodes". Rather, there is a P2P flood-fill n

No offense, but your understanding of how Bitcoin works is quite incorrect. There aren't publicly accessible "mining nodes". Rather, there is a P2P flood-fill network of tens of thousands of nodes, of which a tiny % belong to miners. What nodes are actually operated by miners is very difficult to figure out, and that's a good thing. All miners confirm transactions essentially the same way: highest fee has priority because that's the most profitable way to mine (specifically, feerate: fees/byte). There's no such thing as confirming transactions "faster" or "slower": blocks are found on average every 10 minutes, and all miners have (essentially) the same set of candidate unconfirmed transactions because the P2P network reliably propagates all candidate transactions paying sufficient fees to all miners (there is a dynamically adjusted minimum feerate limit, below which transactions don't propagate, which prevents spam).