Both are savings account in US Dollar. The differences are as follows.

• U.S. Dollar Savings (account number: 7 digits)
  You can use this account to deposit USD.
  New application for this account is no longer accepted. PRESTIA Gaika Cash Card, formerly attached to this account, cannot be used to withdraw USD in cash after September 30, 2021.
  To withdraw USD at ATMs or shop in USD, please use GLOBAL PASS®. If you have not switched your cash cards to GLOBAL PASS, see here for details.
• PRESTIA MultiMoney USD Savings Deposit (account number: 8 digits)
  PRESTIA MultiMoney Account is meant for asset management and use foreign currencies deposited in the account. You can withdraw or shop at Visa merchants in USD with GLOBAL PASS.