Google Analytics: The most of people visiting your website only daily, monthly and yearly basis. you can mostly uses and compare traffic status. More following information visitors keywords content conversions Google Webmaster:- Google webmasters tools reveals google see your website online. we can used any information to fix the problems your website and make your sites more exploring in google. The some information you can get from google webmaster tools. 1. crawling error 2. search quarries 3. links 4. malware 5. html error
Google Analytics: Google Analytics gives you the following information: 1. Web-traffic: The amount of people visiting your site on a daily, monthly and yearly basis. You can also compare your traffic stats to previous years. 2. Visitors: You can track the visitor trend in your site (like: New VS returning, Map Overlay, where they are coming from etc etc.) 3. Keywords: You can check the keyword trend for your site like top ten keywords which are searching, referring sites etc. 4. Content: The web pages your visitors view most often. The pages bringing you the most traffic. The pages your visitors most often leave your site. 5. Conversions: The conversion rates for the goals you set on your site. Google Webmaster Tools: Google Webmaster Tools reveals how Google sees your site online. You can use this information to fix problems with your site and improve your sites visibility with Google and your buyers. Below you’ll find just some of the information you can get from Google Webmaster Tools: Crawling errors, most clicks, how many clicks, sitemap report etc. In a single word we can say that: Google analytics is basically a website statistics tool showing you how and how many people visit your site. Google Webmaster tool shows you how Google sees your site from a search engine perspective.
Well, i think the above explains already very well, but I found sitemaster to be a very useful tool for getting to know how users come to the site, better then GA. Best is to link them together.
google webmaster : will give you the internal structure of the of your site optimization. google analytics : it will give you front end optimization of your website such as visitors views, page views. etc