The 2 big variations are the introduction of the Merkelized Summary Syntax Tree (MAST) and Schnorr Signature. MAST introduces a issue letting the sender and receiver of the transaction to sign off on its settlement together. Schnorr Signature makes it possible for users to aggregate several signatures into one https://financefeeds.com/majority-of-uk-money-mules-are-under-30-says-report/