>>11441759
It's not exactly the accessories that makes SS Ultraman doubled the price though he does come with a few more accessories than Arc as you can see pic related (The SS Ultraman up for preorder is a reissue just FYI). It's mainly because of the Shinkocchou Seihou line it's a part of which is designed as a high end premium Figuarts sub-line and thus more expensive. The team behind it design the figures by sculpting a skeleton and then a human body over it and then the suit design over it. The idea is that the figure replicates the actual suit actor's body proportions and make it look like it is actually a guy in a suit. The articulation also mostly gets a slight upgrade, incorporating swivel joints in the elbows and knees for more range though personally I never use it and would be fine if they didn't bother. Build and plastic quality YMMV on whether it feels better than a mainline in your hands. Generally from experience I would say they feel more smoother to handle than a regular mainline Figuarts.
I do still think Ultraman's price is a bit higher than I would like but it's much better than Kamen Rider The First who only cokes with hands for the same price (and is P-Bandai to boot).