Maybe they're just happy to see a Mac mini?
I don't think you can compare the 2014 with 2018 models, even with the difference in CPU power between the two models.
The fact that you get SSD storage as standard now means very little when you try and match up the prices.
You still see refurbs of the 2014 model on the Apple Store and they are simply even worse value now.
Remember it was possible to spec up a Mini with SSD only and some of the refurbs show that today's pricing is a comparative bargain even before you take into account of the vastly improved CPU benchmarks and - vitally for many - the RAM which you can now upgrade yourself if the have the tools, the time, the patience, and the skill.
There's still an article to be had to compare the 2017 iMac to the 2018 Mac Mini though, and those of us who don't mind paying a few hundred more dollars for a 4k display, keyboard and Apple Mouse might be tempted to go that way.
The Coffee Lake i3 vs Kaby Lake i5 comparisons alone should be interesting.