Well, every time Kyle changes and I think he looks "different" than RC did at that stage, I come across a picture that shows me, NOPE! They are truly brothers - almost identical.
Here is a picture of Kyle, taken earlier this week (he turned 6 months old today):
And, just for comparison, here is a picture taken in the same swing in August of 2003, when RC was 5 months old:
At this age, RC already had a few teeth and was crawling. Kyle still has no teeth, but it seems like that first one is trying to cut through. He doesn't crawl, although he tries really hard! Kyle is smaller than RC was, and acts more like a little baby to me. I'm glad - even though he is my little man, I like that he's still my little baby!