What's the actual difference, because you haven't actually supplied one. You've just said "They're different. One is a thing, and one is a criticism of a thing".

So, does the criticism not hold value? Because a large part of "supply-side economics", a term coined in the 70s, is reduction of taxes and regulations. With the idea that that extra capital will then be used to create jobs.

And if that is not what's happening, then I don't care about the semantics of whether or not "trickle-down" is the appropriate term of art to be applied here. The core concept of "giving rich people more money spurs job growth" is apparently false.