Are all pro or OME leafs stronger?

I currently have OME leafs with an add a leaf on my 2003. It sags and I’m over it. Someone pointed me to the All Pro leafs as a stronger option. They state a 3” lift when running 500 lbs. I thought the OME would do the same but can not find any info on that now. I put them on a year and half ago and they are flattened out. Need something much beefier since I run this as an expedition vehicle for my family adventures. Would the all pro be my best shot or is there something else? The Chevy 63 conversion seems always above my skill grade and maybe overkill is it looks like that is mostly for rock crawlers?
Any help or thoughts are appreciated. Thanks!

 

Deavers is another option although they are more pricey. For a lot of flex aside from Chevy 63’s, I’ve seen archive garage as an option. Many options out there, just depends what your end goal is. Price and purpose are to be considered. All brands above have different stages so many choices to make.