Oscar,

Sapio is essentially a 'Compiler toolchain' you run it once and then send
money to the contract. This is like Solidity in Ethereum.

Sapio Studio is a GUI for interacting with the outputs of a Sapio contract.
This is like Metamask/web3.js in Ethereum.

It's really not comparable to Lightning.

recommend starting with learn.sapio-lang.org :)

Cheers,

Jeremy