Option A. WordPress: You have more control and good statistics. With permalinks and other fine tuning, WordPress is exceptional at SEO. Option B. Blogger You have the advantage of plugging your site into all of Googles applications like AdSense, Analytics, etc. Option C. Spend $20 or so and use WordPress on your own domain. This is by far the best option. If you're serious and you've found something worth doing then spend a little cash and buy a domain. WordPress.com offers some good stuff for free but by using WordPress stand alone you can do virtually anything with your site. It's also worth mentioning tumblr.com which offers a free blogging space and generally ranks very high in Google.
If you look at it from a SEO perspective blogspot would be the great choice. It has WAY more pages indexed and it's owned by Google
it is easy to you and regularly posting gives very earlier pr ,you can (want) check manika-webdevlopment.blogspot.com
For me I prefer blogspot because it is google as the owner and it easily to be accepted if you submitted for google adsense.Wordpress free blog has so many restriction so that make making money life a little bit difficult.
I agree with SeanBlue on all points. Go with option C, you would realize the good decision as time goes by.
WordPress is alot better at SEO, has many more themes available and great customizing options. Blogger is great for a free app, but doesn't come close to WordPress.
When we are comparing wordpress with blogspot it means we are trying to compare the 'free blogs' service from these guys. something.wordpress.com and something.blogspot.com In case of wordpress you can't put javascript or plug-ins and that means no adsense. Of course when you install the 'wordpress' software on your own domain, you are free to put adsense.
Those links from tags are rel=nofollow. Blogger.com is better than wordpress.com but if your splogging wordpress.com is less strict at removing blogs.
It's got to be self-hosted Wordpress (not wordpress.com blog) if you want full control. But what's this got to do with link-building?