As you have gathered, these questions have no answer in the abstract.
For me it often is the razor I just used for a great shave. But it is more than the razor.
Like the fly fisher that catches trout on a fly that they tied, there is great satisfaction in having a great shave with a razor you have honed.
The best razor in the world may shave like a butter knife if not honed well.
That said, everyone knows the best razor is the Chronic. :rofl2: