I have used both as well..... IMO EBC is a better product for Pressure Washers. It works faster and seems to me to be just as safe. There are also a variety of ways to use EBC and that is a plus to me with any product. When you can use a product for different things, it can save you money in other area's by not having to buy other products to carry around. When I used EBC not only was I impressed with how well it worked on grease and oil stains, but seem to make removing gum easier too. BTW, I used cold water only when I tested it. My heater just happened to conk out on me that morning.
I would highly recommend anyone try it....Great Product.