I think TCEC is as close to a fair fight as you're going to get. Obviously, it can't be perfect. A few caveats to your comments (which I mostly agree with). One is that it's easy to add GPUs to a high end machine than CPUs. I'm surprised a 4-socket motherboard (evidently) exists. Secondly, at the consumer level, you can use a consumer GPU with similar processing power as the datacenter GPUs for much cheaper.