Originally Posted by lotus49
Are you sure there isn't something wrong with yours?
I also upgraded from an S2 to an S4 and, until I read your post, it had never occurred to me that there was any real difference between the two of them. The button is extremely easy to press. If it were any softer it would be bordering on floppy.
I was wondering the same thing, and going to joke that the country needs to really work on physical fitness if pressing the home button is a problem.
But I do wonder if maybe it's different on different carrier models, or even just different on different devices.