The image is largely unrelated to the goggles other than ratio and resolution. What you are poking at is a product of vtx, reciever, antennas and environmental factors
I got sent a set of box style goggles to review. I compared them to my fatshark dom v2s and then I got my missus who has never flown fpv to sit in them one at a time whilst I flew
Her opinion, and I agree with it but she was really the blind test, was the fatsharks were much more immersive, it felt more like you were int he quad, rather than sitting behind it
(She used the box goggles first and was perfectly happy with them but then when she tried the fatsharks she much prefered them)
May be due to 2 screens and I don't imagine it is any different for similar goggles such as skyzone, but I am sticking to my doms, and when they die I will be buying another pair.
If the price delta is justified is a different, and subjective matter
You got no one around you flying with fatsharks who would let you try them?