Q.Which Mango Will I Get With Grafting?
My goal is to create more of the same mango trees from the one I have. I’ve been researching and exploring grafting. Maybe a silly question but isn’t that essentially combining the two mango varieties to create a new type? Is one typically more dominant in the grafting process? Is planting the seed the only “sure fire” way to get my exact mango?

Certified GKH Gardening Expert
No, grafting will produce the exact type of the scion, while reaping the benefits of a faster rootstock. The idea is that you have a mango that you like, but is slower, and you graft it to a known root stock that is very fast, but may not fruit well. This creates a faster, more efficient version of your fruiting scion.
Planting a seed from your mango introduces genetic variation and will likely produce something totally different than your tree. Taking a cutting a rooting on its OWN roots will be the only way to replicate your tree, exactly, as it is now.