iPhone 3Gs home button click?

could has iphone 3gs me out? first iphone iphone 4, , bought 3gs too, can test applications on older generation too. problem is, home button on brand new 3gs not have click feel, 1 on iphone 4. instead it's soft, pushing rubber. can confirm if normal? works ok, it's different, i'm used on iphone 4...

 

the 3gs home button has click feel 4 or 4s

 

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