Example: LiteSpeed Cache vs. WP Rocket

1. Caching:
●WP Rocket: Uses file-based caching by storing static pages on the file system. It purges cache by deleting files and checks for cached pages by file presence. Caching operates within WordPress using rewrite rules.
●LiteSpeed Cache: Utilizes server-side caching through the LiteSpeed Web Server. It leverages a tag-based purge system for more accurate cache cleanup and supports Gzip and Brotli compression out of the box. LiteSpeed also offers flexible caching options based on device, location, or user group.

2. Cost:
●WP Rocket: $49/year, no free version, 14-day money-back guarantee.
●LiteSpeed Cache: Free plugin, but requires a LiteSpeed web server (OpenLiteSpeed is free; Enterprise licenses range from free to $96/month).

3. eCommerce:
●WP Rocket: Automatically excludes cart and checkout pages from caching, ensuring these pages with private content are dynamically generated each time.
●LiteSpeed Cache: Uses ESI (Edge Side Includes) to cache eCommerce pages like WooCommerce, by allowing private content (like shopping carts) to be dynamically inserted into a cached page, enabling full caching for mixed-content pages.

4. Premium Services:
●WP Rocket: Does not offer any additional premium services.
●LiteSpeed Cache: Offers image optimization, critical CSS generation, unique CSS generation, and low-quality image placeholder generation, all performed remotely on QUIC.cloud servers. Each service includes a free monthly quota, with additional usage available for purchase.

5.Cache Preloading:
●WP Rocket: Uses a crawler that simulates a non-logged-in desktop user to cache uncached pages.
●LiteSpeed Cache: Also uses a crawler simulating a non-logged-in desktop user by default, but can be configured to simulate mobile users or logged-in users with specific cookies or user groups. It allows multiple crawlers for simulating various user interactions, providing greater flexibility in cache preloading.

6. Benchmarks:
●WP Rocket (with Apache): Peaked around 700 requests per second.
●WP Rocket (with LiteSpeed Web Server): Delivered around 3,800 requests per second.
●LiteSpeed Cache (with LiteSpeed Web Server): Handled nearly 4,500 requests per second, outperforming both Apache and WP Rocket configurations.

7. Feature Comparison:
● LiteSpeed Cache:
(a). Cache Features: Full-page cache, smart purge, tight server integration, Edge Side Includes (ESI), cache for logged-in users, mobile views, user group variations, geographic variations, scheduled URL purge, and browser cache support.
(b). Optimization Features: CDN support, database optimization, CSS/JS minification and combination, lazy load images/iframes, HTML minification, and wildcard CDN support.
(c). Premium Services: Critical CSS, unique CSS, image optimization, and low-quality image placeholder generation with free monthly quotas (via QUIC.cloud).
(d). Cost: Free plugin; caching requires LiteSpeed web server (paid). Optimization features work with any server. Premium services have free tiers with paid options.

● WP Rocket:
(a). Cache Features: Full-page cache, user cache for logged-in users, mobile views, geographic variations, and browser cache support. Lacks smart purge, ESI, and scheduled URL purge.
(b). Optimization Features: CDN support, database optimization, CSS/JS minification and combination, lazy load images/iframes, and HTML minification. Lacks wildcard CDN support.
(c). Premium Services: No extra premium services like image optimization or low-quality image placeholders.
(d). Cost: Paid plugin with paid support.

※ For more details:the super detailed guide from LiteSpeed