Investopedia says that a limit order is:
An order placed with a brokerage to buy or sell a set number of shares at a specified price or better.
Investopedia says that an at-or-better order is:
An order condition instructing a broker to only fill a transaction at a specific price or above it.
Isn't "at a specified price or better" the same as "at a specified price or above"?
What is the difference between a limit orders and an at-or-better order?