My pick is always the more realistic scarcity model, like that of Decrits or eMunie for example, where supply adjusts to demand proportionately, not inversely proportionate like that of Primecoin.
If that were the case, you should be denouncing bitcoin and gold rather than making claims that how primecoin's scarcity is inferior to bitcoin.
Your argument of Primecoin being scarce is only true based on the assumption that demand for Primecoin is on a constant linear increase. And as we have seen so far, this is not the case, because I have been observing demand for it closely since the begining.
There is no such assumption, the scarcity is based on Moore's Law, the fact that difficulty and mint rate change with demand is just incidental and temporary effect, which has no bearing on the long term scarcity model.