Idiom

Rather than having your users download a new page each time they click to view older posts, speed up your website by dynamically loading those posts on the same page using ajax. With minimal editing to your theme files, Easy Load More will add a button for ajax content loading. Works automatically on your front page, any taxonomy or custom post type page, any archive page, and search pages without special configuration.
Easy Load More has a light footprint that won’t slow your website down. Buttons are lightly styled that won’t override or interfere with your theme styles. The required javascript is tiny at only 766 bytes. Animated loading icons are rendered with SVG so your users don’t have to download images. Finally advanced theme developers can optionally turn off plugin styles and javascript to bundle it with theme files, reduce HTTP requests that increase page load time, and completely customize the look and feel of the loading buttons.

Easy Load More

Add a "Load More" button to dynamically add posts without pagination and page loads.

Webgensis

The PIugin is very useful for them who wants to show only a few number of posts on their home page and after that if the user is interested to view more then it will offers a option of Load More. The Simple Load More Plugin will add a button in the bottom of your posts for loading Ajax Content.
Simple Load More Plugin automatically works on your home page. It also compatible to work with taxonomy, custom post type pages, search pages and archive pages and also with special configuration of WordPress posts and pages.This Plugin also has the feature to choose the icon of loading process from various available icon sets. Simple Load More is an open source plugin which is available to download from WordPress Plugin Gallery.

Easy Load More vs Simple Load More