Connection Pooling wrapper

I was wondering if there is any difference between doing this:

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OraclePool op = new OraclePool(jdbcURL, userName, password, properties, "OracleSemConnPool");
Oracle oracle = op.getOracle();
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And doing this:

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OracleConnectionPoolDataSource ocpds = new OracleConnectionPoolDataSource();
ocpds.setDatabaseName(databaseName);
ocpds.setPortNumber(port);
ocpds.setUser(userName);
ocpds.setPassword(password);
PooledConnection pc = ocpds.getPooledConnection();
Connection conn = pc.getConnection();
Oracle oracle = new Oracle(conn);
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Also, will I get any strange behavior if I register a Data Change Notification like this:

OraclePool op = new OraclePool(jdbcURL, userName, password, properties, "OracleSemConnPool");
OracleConnection conn = op.getOracle().getConnection();
DatabaseChangeRegistration dcr = conn.registerDatabaseChangeNotification(prop);