Tiki or PostNuke? Which one is easier to work with? More flexible?

Well, I looked at all suggestions and now I am down to two choices: I am cosidering Tiki VS PostNuke. Which one would be easier to work with? Main feature I need is different content for different usernames (not user groups). At least what I need is initial page to look different for each user (each user will have custom page only for them). And artists pages that could be simply generated by plugging in content (see example of a static on for a funk group http://carmelme.com/bumpus/) linked from one central page like http://carmelme.com/booking.html . Plus I need to have "tell-your-friend" function. Thanx