FYI, I responded to the OP's request by posting an independent review of the apps. Each person will have a different view, as the apps are different. Crash seems to be made for kids. But some adults may like that. And I understand that spousal approval is involved, so I totally get the OP's situation.
But with respect to your comment, a person who cannot afford $6 should not be purchasing an iPhone or an iPod touch that costs anywhere between $200 and $300 (plus monthly charges in the case of the phone). And, if you are able to read, you can see that the OP has the cash. Overall, if the OP doesn't have the cash, he should not be buying EITHER app. He should be buying an app that tracks spending instead (or finding one for FREE), and he should not be looking to purchase a game. That would be my advice.
And you are making an assumption that I can't save money; that is highly asinine of you. I purchased these apps for $10 apiece, and I would gladly pay $8 for both now. In essence, the OP is saving money by purchasing both of the apps at this point. He is saving $12, as the apps are on sale.
Please make sure that you read the whole thread before you post comments that do not respond to the OP's question. I don't see you offering any advice as to which app is better. Your post is baseless and useless.
This type of attitude is what's wrong with people that can't save money, and I can't help point it out.
There is absolutely NOTHING with wanting to save 6 or 2 or 1 dollars by only purchasing ONE of these racing applications, and in the OPs case spending the extra few minutes to make sure he is choosing the best "bang for your buck" option. The fact that you can't imagine not being able to scrape up another 6$ is crazy - 6$is not a small amount of money to some.