Is the iPhone 4s more sensitive than the 4?

I want a really responsive phone!
also… If you don't mind can you tell me which is better in your opinion and which is worth the money?

Well the Pros of the Iphone 4S are:

•Siri - Want to take advantage of the impressive and useful voice recognition features offered by Siri? You'll need an iPhone 4S because Siri doesn't run on earlier models.
•Fast processor - The iPhone 4S's A5 processor is about twice as fast the processor in the iPhone 4 (though not as fast as the processor in the iPhone 5), so you'll go faster and get better graphics performance.
•Better camera & video - Here you'll get an 8 megapixel camera that can record 1080p HD video, as opposed to the iPhone 4's 5 megapixel/720p HD camera.
•Better battery - The 4S's better is a bit better than the 4's; expect to get about an extra hour of talk time from the new phone.