I'm pretty sure both of these games weren't that great; you should read game reviews at gamespot.com, a site I think is very good; there's the reviewer's review, and then there are the players' reviews (some of them look "canned," especially the shorter very positive reviews; but others are legitimate, and are very good to read).
Finally, if I'm still not sure, I go to the game's website ; you can find out a lot about how the game manufacturer treats its customers and the problems and bugs people are encountering.
Around 95% of the games out there stink; only a handful are any good and worth the money.
You have to read a few reviews before you make that purchase, or else there is a high probability you'll get ripped off.
gamespot.com has saved me a lot of money; it separates the wheat from the chaff.