I feel that any of the name brand polishes are all about the same. I don't feel that one is all that much better than the others.
However, I have a preference. I prefer the new synthetic polishes. Turtle Wax Ice liquid polish for example. These new synthetic polishes do not leave the powdery residue in the little nooks and crannies. They are much more forgiving in the temperature range which they can be applied. You can apply in both direct sunlight or on a cooler day. Something that would create a big mess with the older style car wax. It works on all surfaces, except maybe the glass.
The synthetic polish is much easier to apply. I can polish my smaller car in about 20 minutes from start to finish. I can do my larger full size car in about 30 minutes from start to finish. Since the job is easier, It also works great on my motorcycle which has a lot of nooks and crannies. I feel that I may polish my cars more often.
Again. All of the major car polish companies make similar products. I feel these are also all about the same. I only stay with the Turtle Wax Ice because it was the first one I used that I liked and do not feel the need to change.
Just as important. When you wash your car don't reach for the dish washing soap or laundry detergent. Do it right and use car wash soap. Besides, this correct soap is relatively inexpensive. As before, all of the major car polish companies make this car wash soap and one is as good as the other.
Again, I have a preference. I use Turtle Wax Zip Wax. This car wash soap has wax in it. It applies a little wax each time you wash. But it is no substitution for the correct car polish.