TwiTip.com has a great post on what the differences and what the similarities are between Facebook and Twitter. The article highlights the pros and cons of both services and what type of person each service appeals to.
A very interesting article. Below are the pros and cons of each service. Take a look.
Twitter Pros
* Easy to navigate and update, link to and promote anything
* Reach far beyond your inner circle of friends
* One feed pools all users; anyone can follow anyone else unless blocked
* Pure communication tool, rapid responsiveness
* You dont have to be logged in to get updates; you can just use an RSS reader
* Very interactive, extensible messaging platform with open APIs
* Many other applications being developed (Twitterific, Summize, Twhirl, etc.)
* Potential SMS text messaging revenue from wireless networks (although Twitter states they are not currently getting any cut)
* Potential future advertising and/or enterprise subscription-based revenue streams* With its thin overhead, Twitter is probably more scalable than Facebook, giving it a cost advantageTwitter Cons
* Limited functionality; find people, send brief messages, direct replies
* Limited to 140 characters per update
* Not all people find it immediately useful
* Over-emphasis on follower counts
* Easily abused for spam and increasing the noise level
* Relatively smaller installed user base
* As yet no readily apparent monetization strategy
Facebook Pros
* Application mashup; find people, make connections, email, instant messaging, image/video sharing, etc.
* Most people can quickly grasp the value of connecting with friends, family and established contacts; some people report they use Facebook instead of email and IM
* More emphasis on deep connections with others vs. who has the most connections
* True Friends feature increases your transparency to selected connections; almost like having private and public profiles
* Huge, rapidly growing installed user base
* Inherit stickiness, third party applications, gift giving and personal data collection make Facebook a powerful advertising platform
Facebook Cons
* More difficult to navigate and update
* Requires investment of time to realize sustained benefit
* Opt in model requires a user to allow others to connect
* Less immediate responses; unless you stay logged on continually
* Overhead of mashup and thick applications could limit scalability, bloat cost structure
via Facebook vs Twitter.