Nothing stays the same

Much as you may try to raise your children all the same, it isn't possible.  You aren't the same as you were when you were newly married, your family income doesn't stay the same, your child rearing style might change, your children definitely change.  The only thing you can do is do your best in whatever circumstances you are in.

I have eight children who are spaced over sixteen years.  The oldest four spent most of their childhood in Oregon while the youngest four claim Washington as their home base.  We traveled a lot with my husband's job when the older children were little but we've stayed in the same location for fourteen years now.   These things change the dynamics of a family whether you want them to or not.  And, we're not even taking into account the different personalities that each child brings into a family. 

So, don't worry if your younger children have different experiences than your older ones.  That's perfectly normal.  As long as you consistently live by your core values and standards, your children are going to be fine...even if Junior DID get to do something that big brother didn't get to do :)