While SFI and TripleClicks are two separate entities with each offering distinct goals, it is possible to address them both in a single blog. My blog covers both quite well under separate headings. I don't believe people are that easily confused by presenting both in a single blog. The true answer, though, is only found within you and how you feel about addressing the two. There are no statistics that I am aware of that can positively point to which is better.
