A good Tower will give you much better dynamic range than most any Standmount.
Likewise, a 3-way speaker, designed well, will give you much more clarity in your mids… not so much output rather the dedicated driver will be working within its ideal band for audio reproduction.
As for bass in the tower, if you cross at 80, the tower will still be reproducing usable output at 60Hz and even below. On the flip side, a stand mount that may have an F3 at 60Hz will need to be crossed up around 120 in most stuations. That doesn’t mean it can’t or won’t work, it just changes thing.
Subs can start to be localized up around 120Hz, for example, and many don’t like pushing them that high if it can be avoided.