None. This is like asking which is better, a jetfighter, a pineapple, or BitCoins.
The 3 products mentioned serve absolutely different purposes and cannot be compared. The only reply that has some sense may be that for TCredits you may get the other two but not vice versa, so if you want them all, you probably have to choose TC-s.
Like getting BitCoins first in my example and buying with them what you wish.
