Both of them are okay. Both the problem with blogger is they will stop your blog without notifying you.
Like most of the posters on this thread, I too prefer Wordpress over blogger, since it give a unique custom and professional feel, where blogger can easily look like a free space.
If you are looking at setting up a serious Blog then Wordpress is the only choice but if you only say want to setup a very basic support/news update blog for your main website then Blogger can be used with some great results as well and it free.
For some reason people are using blogger because it's free and easy to use while Wordpress doing a lot of good things too and it needs an advance learning on how to navigate it.
Hey, If you're just started Blogging, then I recommend you to use Blogger. Wanna Know Why? Here's my answer - http://goo.gl/5xUxV
Just came across this blog post at Pingdom. Google has also referred this article on their official blogger blog. I'm sure this might change the perception of several members here at DP. http://royal.pingdom.com/2010/12/17/the-most-reliable-and-unreliable-blogging-services-2/
A plugin - plugs in to your blog and provides you with further functionality on your blog. i believed i'd list fifteen wordpress plugins - a number of that you will have already got and others you will not be at home with. To add plugins log into your blog - seek for PLUGINS within the left hand facet menu and click on on add new, then simply do a groundwork for the one you wish to feature and activate it.
blogger all the way! see my blog here - Health Talk, its on the first page of google for my chosen keyword. Its not hard to optimize blogger blogs unlike what others tend to say....