From what I observed, it heavily depends on the topic and the creator.
For example, teeth regeneration or brain regeneration or any kind of medical-field is something that exceeds the (current) power of subliminals by far, simply because, as lilac pointed out, it gives your cells direct instructions what to do.
On the other side, when it is about mindset-shifts or behavioural changes I believe it is not always the same. My assumption (I am stressing out this is an assumption) is that (good) subliminals may work faster for that because they make your mind contemplate the words that are being used in the subliminal, whereas a field changes the information in your aura, which leads to the desired results, but you don’t know how you got there. You just “ended up like that.”
For example, let’s take a good subliminal against procrastionation and a field for the same purpose.
The subliminal would probably have to dig through some resistance and you might have negative thoughts. After that you find yourself more productive in general and as time goes on you start adopting a philosophy of productiveness in your life.
You will find more and more reasons to be productive.
The field will do the same, but you wont feel an internal reason for that shift and it is likely that your most productive times will be when you use the field (Which is quite convenient btw)
Again, this is just an assumption and I am not 100% sure about that either. It’s just what I have understood so far.