echo is more useful because you can pass it several parameters

 
<?php
            echo "This ", "is ", "a ", "test.";
    ?>

1.	A Simple "Hello World" Script
2.	Add lines and spaces to textarea
3.	Correct escaping of special characters
4.	Formatting of Numeric Data
5.	Key-value array elements
6.	Echo out html tags
7.	Enclosure html into a string and echo out
8.	echo versus print
9.	how arrays embedded in strings will be converted.
10.	embedded variables are handled when the string is created with single or double quotes.

echo is more useful because you can pass it several parameters : echo « Utility Function « PHP