I have never used the products you mentionned so I can't comment.
The one I have been using is Optimum No Rinse Wash and Wax. It's a good product. Only need half an ounce to wash a vehicle and it does a good job at it. It is important to dry the car after the wash so you will want good quality microfiber towels for that and also some sort of air blower (can be a leaf blower or speciality car drying blower) so you can remove the water from the cracks.
I strongly believe Garry Dean's product is Optimum No Rinse Under a different name. I can't be sure because I have never used his but it looks the same and the applications are pretty much the same. Garry Dean doesn't as far as I know make his own products and ONR is an excellent product so it would make sense for him to use it in his brand. Maybe some people have used both and can comment?
Now, if you want to have more than one level of wash, I would suggest you also purchase a No Rinse Wash that doesn't contain wax and apply a spray wax during the drying process. Meguiar's Xpress Spray Wax works great for this.
Last thing, I really like Garry Dean's improved wash method using a bunch of microfiber towels in a bucket of No Rinse product and discarding them as they get dirty. You get the advantages of a 2 bucket method without the time it takes to do a 2 bucket wash.
Keep in mind that No Rinse Washes should not be used if the car is filthy. If the car is loaded with dirt and grime, you will scratch the paint doing this kind of wash.
