Easy, I'll focus on what's the same, everything else is different.
1) They both beging with the Letters "ADO"
2) They both have objects named Command and Connection
3) You can connect into ODBC, OledB databases with both of them (although
ADO.NET has many more specific providers.
4) A command object needs a connection to work, and a connection needs a
valid connection string to work in both of them.
Other than that absolutely everything else it different.
