Those both sound like good options. The main decision relates to you might thicken the trunk. If you want the first trunk to grow larger, you can let the top branch on the tree grow freely for a few years while keeping the other branches in check. The movement in the trunk is good and could make for a compelling small tree.
Because the second tree is nicely planted on a stone, I’d consider starting to refine the branches and work with the trunk as is. Fall will be the time for minor cutback and needle thinning, and you could start decandling the tree next summer.
You could do the same with the first tree too if you’re OK with the trunk as it is now - both approaches are good but each will yield a different tree.