tl;dr: Proof of Stake sidechain.
It says it will have support for LN. That's unique. But as I understand it, it won't be the Bitcoin Lightning Network, but the Sequentia Lightning network. I could be wrong. If someone reading this knows, please correct me.
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I also shared that blog post as a post of its own, here on SN:
Comparison between Sequentia and competitors (RGB, Taro, Omni, Liquid, & more) #119151 https://sequentia.io/comparison-sequentia-competitors
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