A2hosting has a strong webhosting compare to 1and1. A2hosting give you the full scale and complex in building your website fast. The a2hosting is build-in to optimized your hosting also addon future such as the cloudflare speed up your website in any geographical location. The performance in a2hosting is very great and has a good server best for the webdeveloper who wants to scale more the performance of the website. Unlike 1and1 price is cheaper compare to a2hosting. If you want to save money in your website server then get 1and1 but the performance is slow compare to a2hosting. To optimized your website performance best to invest wisely in a2hosting. leverage your serve using more website configuration settings.
1and1 webhosting strength is domain registration selling millions of domain provider. 1and1 is know for domain registration not of webhosting. If you want to use 1and1 best for domain registration. Unlike the a2hosting the strength is webhosting provider. I advice if you want to use 1and1 buy your domain registration and if you use a2hosting get best performance for your webhosting. Bewise in buying domain registration get 1and1 and buy more if you want to imvest in domains. they are number 1 in domain registration. 1and1 is not know for webhosting only in domain registration.