Six watts idle, x86, NVMe, and it costs what a Pi plus a decent power supply plus a case plus an SSD adapter costs. The Pi won on price for exactly one generation.
Both are a third party you are trusting with your traffic. One of them is a company and the other one is a certificate authority, so choose which outage you would rather explain.
Ninety-four percent inbox placement to the big three, after two months of warmup and one very unpleasant week with a shared IP block. Would I do it again: for a hobby domain, yes.