Below are some key points which should help you make your decision:
Nginx and Apache are the most used open source web servers. However for larger web setups, Nginx outperforms Apache. Nginx hosting uses an Asynchronous approach which is event-driven for handling requests. This provides predictable performance under load, as against the Apache HTTP server which makes use of a threaded or process oriented approach for the same.
Nginx is second most used open source web server. The compatibility with most modern OS including Windows and Linux makes it an optimal choice.
Though Nginx is smaller in size, it multiplies the performance remarkably by reducing the RAM and CPU usage for real time applications.
The features like load balancing, logical infrastructure, easy configuration, predicable performance and flexibility makes it a scalable solution for larger businesses and websites which handle millions of visitors every day.
Today over 10% of top 1 million sites are using Nginx. It is exclusively designed for heavy traffic websites with load balancing support as well as proxy support. If you are a system administration techy, Nginx is absolutely the best choice for you.