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Instead of asking if an exercise is better or worse, here’s a simpler question.
What’s the constraint in the lift? Basically what is the bottleneck or constraint in the lift.
In a single leg squat, your balance and mobility are the constraints.
In a double leg squat, depending on the gadget used the constraint changes.
With a barbell squat, your shoulder mobility, ankle mobility, and tolerance for spinal compression could be constraints.
In a goblet squat using dumbbells or kettlebells, holding the weight in a rack position is the constraint. The heavier you go, the more the unstable position is a limiting factor to a well-executed squat that challenges the legs.
In a lever squat, the initial setup (height of the pivot point), the length of the lever, how far the load is from the lifter influences the squat pattern.
In a hack squat, there is next to no stabilization required to perform the squat.
You’ll notice that every way to load the squat has its pros and cons. It isn’t better or worse.
There are different strength outcomes. The key question is what is the most relevant outcome for your goals, constraints or style of training.
There really isn’t a best exercise or best tool. It almost always comes down to having weighed the pros and cons, this makes sense for what I am trying to achieve. Or in most cases, this is what I have and this is how I can make the most of it before looking for something that allows me to scale things more smoothly.