Difference between Home button pressure

Hello there. I've just replaced my good ol' 3GS to 4S(God, it's blazing fast), but in 3GS I had more-like clicky pressure when pushing home button. In 4S home button has more, more softly click than 3GS. And volume buttons - volume down is fine, volume up requires more pressure and doesn't have clicky sound. And when you click on the edge of volume up, it hardly catches. It is normal?

 

You're right, just wondering if there were some changes. In 4S home button click is much more shallow than 3GS, whereas 3GS has loud, juicy click

Lock/power button is as same as volume down, volume up has a feeling like it's blocking inside, but also works properly.

And I also noted that vibrations are different. In 4S are more powerful.