Okay, lets me see if I can help with this.
plain HTML lets HTML print out the text.
echo statement has php simply print out HTML code.
print statement is a function, so it uses more recourses.
This is for the most part how I have come to understand it. Many people have tested all three to see what is faster to use, and yes it's way to close to matter to most of us.
When I was first working with php I was using echo since that was all I really ever seen. Then I bought a PHP book and they used a "pro" looking print tag
that I started using. That is until I read that it's a function that has to process the HTML, well do I have to tell you what I'm back to using now? Right the echo tag. Straight HTML might be faster, but it looks less attractive and probably uses more characters when mixed with allot of php.