What are you trying to achieve? Do you have a page per location on your webstite and on each, this is where you're implementing geo/location based schema?
Which is better depends on its purpose, schema markup is intended to provide as much information to search engines as possible, anything of relevance to a website's products or services.
It is likely what you're after is the organisation markup, this can also appear in Google Places listings too. Look at the Microdata link at the bottom of that page and implement what is relevant to your website from there.
Currently rich snippet markup won't have a direct influence on rankings, however the correct implementation will make results from your website appear more prominent in search results.
It would be worth looking over the specification for Schema's organisation / local business markup too so you can see what is available to you.
Something such as the following should be relevant to what you are trying to achieve...
Business Name
Address Line 1
Address Line 2
City / Town
County / State
Post / Zip Code
777 888 999
me@mywebsite.com
http://www.mywebsite.com
Anything that you require testing to see if it is implemented correctly and will appear in the search results as you intend can be done with Google's Rich Snippet Testing Tool or this Microdata Tool.
Hope that points you in the right direction for now.