I've been using Bing since I found the Bing Rewards (http://www.bing.com/rewards), which gives you a point per 2 searches and lets you redeem the points for something later on. I have not found myself going back to Google, yet.
Weird that you find them comparable. I've compared the two and Bing's results are just kind of weird (old results and non-related results come up). It's worth 50 cents a day for me to have decent results.
When did you do the comparison? In the summer of '09 when Bing launched I gave it a shot, but just did not like it as much as Google. A few months ago I went back and tried it again, and have not gone back to Google since.
Google have a special case for vanity / people searches. I don't think that searching for yourself would given an accurate representation of the two search engines.
If you really were getting 2 points per search I'd do it, but I just tried it out and it doesn't work that way, you only get points by taking advantage of their offers which are similar to Dropbox's free storage promos and WoW quests:
How do I earn credits?
You earn credits by taking advantage of offers that may include searching or exploring features of Bing. Offers are found in the Rewards credit counter located in the top right of the header on Bing.
And this buried a bit deeper: Search and earn. Earn 1 credit per 5 Bing searches up to 8 a day until Apr 30.
Assuming you make 50 searches per day, you'll make at most $.50 - is it really worth it for a half dollar a day?