Basically the differences are in the concepts you'll use to write code. Lisps themselves are very different from each other, but just like the languages you're used to, many lisp distributions have standard libraries that can be called, and those building blocks can be used to build applications or whatever else. In this case specifically, Steel provides the facility to call Rust functions within a Steel program: https://github.com/mattwparas/steel.

So, although I haven't used Steel, it looks like the advantage you'd get from using it is the opportunity to take advantage of features it provides like transducers and contracts, which are feature common to some other Lisps as well.

So, just like choosing any other language, it boils down to a series of tradeoffs.