There are a lot of finishes out there and the different finishes react differently depending on the climate in which you live. Humidity is a big factor.
Another factor is you skin type because the oils in your skin will affect the grip of the different metal. Chrome, Titanium Gold, Brass, Stainless Steel, and Powder Coated are common finishes. So how do you know which to pick? Here is an article that goes into detail about the different dance pole finish types >>
It is tough to say which is the best because I don’t know you or your climate. The most common is chrome. If you are near a pole studio, ask them what works best for them. Always remember that you can use a grip aid if you are overly concerned about getting the correct finish for that reason.