I don't have my own lift but plan on it eventually.
I did my apprenticeship at a Ford dealer and used both hoists. The 4 post was way more versatile. Depending on vehicle length and frame configuration the 2 post could just get sketchy getting it all set-up an finding the balance points.
Never dropped a car but it happens often enough. A 4 post with a set of jack trays on air was great. Plus when working the hoist gives a nice place to put your tools down.
