Zetsu Akai Katana is Akai Katana Shin with the original arcade systems. So Shin is more like the Arrange mode, while Zetsu is Ver. 1.5. I love this one!
The major differences are the now 16:9 aspect ratio, Shin's nerfed patterns and the range to recharge Guidance Gauge is much more lenient. It makes your survival feel more in your control. To compensate, it adds a new Stage 5 which is a pretty long one. I'm not sure if you can access the TLB, though.
Type B's main feature is it's homing and lock-on capability. The option positioning is as unstable as ever, but with the newfound leniency Type B is the new OP shot type. The laser's travel speed had been buffed too! At least it's not too obviously OP in comparison to the others.
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