They're the same premise, that Lightning is insufficient

But, Lightning's limitations are inherited properties of Bitcoin, and therefore cannot be "solved" without trust

Ark uses false narratives to position itself as having solved the limitations of lightning when really it's just trust smuggling

They invented terms like pre-confirmed transactions and VTXOs to make it sound like a technical solution. They lie about scaling to poors that can't afford chain security, online-ess etc.

OP here is just retarded, but Ark is malicious as evidenced by their deceptive marketing. That's the only distinction.