What's the difference in all the polynomial solve/root/zero functions?

[ewjax]

Hello,

I am confused by why the Prime has so many different menu options for solving polynomial roots. They all seem conceptually identical to me.

Toolbox / CAS / Solve / Solve -> solve()
Toolbox / CAS / Solve / Zeros -> zeros()
Toolbox / CAS / Solve / Complex Solve -> csolve()
Toolbox / CAS / Solve / Complex Zeros -> cZeros()
Toolbox / CAS / Polynomial / Find Roots -> proot()

Although the syntax in the last (proot) is slightly different from the first four, and some return {} lists while others return [] vectors, all five functions yield identical answers when you feed them the polynomial

x^4 -1 = 0 -> {-1, i, 1, -i} or [-1 i 1 -i]

Can someone offer any insight into when you might need to select one over the others?