Differences & benefits between HTTPS .htaccess Redirects examples

Question

In the past I've always used the following code to force redirect to https:

RewriteEngine On
RewriteCond %{HTTPS} off
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

I since renewed my hosting and ran into some issues with SSL. I was advised to use the following:

RewriteEngine On 
RewriteCond %{SERVER_PORT} 80
RewriteCond %{HTTP_HOST} ^(www\.)?coolexample\.com
RewriteRule ^(.*)$ https://www.coolexample.com/$1 [R,L]

As per this guide.

What's the difference here, and are there any benefits to using a specific version?

I've checked similar questions, such as this, but doesn't help with these examples. Thank you.