got to meguiars web site marinerv.meguiars.com or call toll free 800-347-5700 (for free , expert boat care advise)..no not spam i just happen to have a boat care flier from there....it really depends on your boat surface and how messed up it is........
personally i have used them all , i used to get free demo's all the time in the body shop, have huge amounts of samples, used them on my show car and my truck..and the boat..(im my useless opinion) most waxes have the same shit in them now, i go for what ever is on sale and is the easiest to use for your application