This is a side by side comparison of the iPhone to the instinct, done by The iPhone Blog. This is what they had to say aside from the video:
Compared to the original iPhone 2G, the Instinct actually holds up quite well. It’s not as elegant as the iPhone, the touchscreen isn’t as responsive (but it does give you a little haptics-vibrate on every tap), they keyboard isn’t as good (but does offer a landscape version throughout), the apps are a mix of quality iPhone knocks off and java craplets, the browser is decent but nowhere near the quality of the iPhone’s, …I could list the “not as good as” for quite awhile. The bottom line is that, feature-for-feature, the Instinct holds its own, and it’s especially nice that Sprint’s ‘unlimited’ plan includes sms, data, gps, etc.
[Source: The iPhone Blog]
