Are there any other coins with AA implementation?

Yes, it is same what other mistakenly call "smart-contracts". Obyte already calls smart-contracts those addresses, which have basic spending restrictions (lot more options than Bitcoin has with OP codes). https://developer.obyte.org/contracts/reference

Even Ethereum called their smart-contracts as Autonomous Agents in the white paper https://github.com/ethereum/wiki/wiki/White-Paper#ethereum-accounts and there have been debates on changing the name to something else https://twitter.com/vitalikbuterin/status/1051160932699770882

Biggest difference is that Oscript language is more like declarative and is basically dynamic address definition with placeholders while Solidity is imperative language. Also, Oscript gives you less rope to hang yourself, so you can't use loops, but otherwise Obyte Autonomous Agents give developers access to more features than Ethereum comes with out of the box. https://developer.obyte.org/autonomous-agents/oscript-language-reference