The Ideal Workshop

4 post are nice for oil changes or storing cars/Stacking, and you just drive on them. But, you need a separate center section to lift the wheels off the ramps... The 4 post also get in the way more when you are working on the car... 2 post take a couple minutes more to get a car in the air, but all the wheels are off the ground and there is little to get in the way...
My 2 post is one of my better investments IMO
Eventually I want to get a 4 post for the other side of the shop to store cars and free up some space but Im glad I purchased the 2 post first...
I have a 4 door Diesel truck that weighs over 8000lbs and it puts it over my head with no problems....