As I recall When I purchased my Refurbished MM(Late 2012) from the Apple On-Line Store there were no Refurbished MM's available with an SSD. My options at that time were only Fusion or a Hard drive.
I wasn't talking about your specific case specifically.
More that the hardware did exist and was on the market, in the 2012 model line up.
People comparing CPU performance across mini models are kinda missing apple's intended audience with it. I'm speaking from Apple's perspective as a company intending to put out a product lineup to make money with.
It is an entry level device. There has been no revolution in hardware outside of thunderbolt 3/USB-C.
The average intended mini customer would not know or care about the performance difference between a 2012 or a 2014 machine, as most people are IO bound or RAM bound for most of the time they spend using the device.
Most end user desktop machines spend the majority of their life 80%-90% idle on CPU, waiting for the user.
Connectivity via USB-C/TB3 is a highly visible compatibility-with-new-standards issue to be resolved.
For the "typical" entry level computer user, you could stick a core2 duo 1.8 in the machine and given sufficient ram and fast storage it would be quick enough.
The huge number of users on this forum still using pre-2010 macbooks quite happily will attest to that. If you're doing stuff like video editing you aren't the "typical" mini user. You're an anomaly. There's nothing wrong with that, but just be aware that Apple is not aiming the Mini at people such as yourself.