I've set up a lot of blogs for customers on both platforms, and if you want something that you just set up once, add posts to and otherwise ignore, then Blogger is the platform for you. But if you actually want to work on your site, add features, change appearance, integrate with other services, that sort of thing - then you have to go with WordPress. BUT follow all their security protocols because they are always the first to get hacked if you aren't careful.