Comparison of Twitter and Spoink

I am comparing Twitter and Spoink. I feel like I don't understand enough about each one yet, but so far I like the Spoink FAQ's better than the help I found in Twitter. In Twitter's help area you type in what you are looking for and then hope someone else has asked a similar question. I found that much more frustrating to use than Spoink's FAQ's. I couldn't find out from Twitter how to upload a picture from my cell phone or a file or the web. In Spoink, in the FAQ area, it answered it right there. I also was able to do a Podcast (amazing to me!) in Spoink. I can't figure out how to do that in Twitter. In my opinion, I can see that Twitter would be a good mostly for communication using text. Also in my opinion, Spoink seems to offer more tools, such as podcasting, sending pictures, and videos than Twitter. Twitter may offer those tools also, but they seem hidden to me. I will continue to check out both Twitter and Spoink. I have had a bit of difficulty in Twitter in the "following" and "followers" area. I believe that it is just not crystal clear in my head yet. I can see where each tool would be helpful as an instructor to let students know information right when you needed them to know, such as a class being cancelled or a homework assignment being clarified, or a neat web tool to help with an assignment, or breaking news for a class discussion. Just my two cents...