@Rand__ well, yes.. Storage Spaces Direct in parity resiliency is pathetically weak in terms of performance unless you are going to throw in an enormous amount of NVMe or flash cache to fully cover your working set. However, S2D performs quite good in "2-way mirror" mode. The only major drawback in 2-node S2D deployment is the lack of redundancy (FTT=1). You can fix this by adding the third node and do the "3-way mirror" though.
As for smaller vendors, I'm referring mostly to StarWind vSAN, which is a performance beast even in 2-node configuration. HPE VSA is also great, but it's inability to run in kernel mode leads to noticeable performance compromises. Anyway, from what I have tested/learned, you should not consider VMware VSAN if you are building a performance-oriented cluster. VSAN has other benefits, but performance is not one of them.