Auroracoin is more expensive only because it was the first country-scam-coin. It still retains some speculative pumping from non-Icelanders, but only because it came first.
The main problem with Auroracoin, Spaincoin and the like is that their airdrops are not fair at all and do not promote any growth in coin adoption. They promise equal distribution among citizens -- this is their only real advantage over bitcoin -- but they are instead shared between the earliest adopters only (except the small breadcrumbs left for mining).
This is quite similar to the case of the distribution of Counterparty: Its devs claim that XCP were fairly distributed because users claimed them through burning bitcoins. However, once I learned about it (it hit the frontpage) and was willing to burn my bitcoins, I discovered that it was no longer possible. Top-earliest-adopters get all; how could this ever be fair?
The only justification for an early airdrop is that, before it takes place, the coin is heavily centralized (why the launch should then precede the airdrop escapes me though). Spaincoin for example has the worse of both worlds: most of the coins will be distributed by the end of this month, yet small portions will be left in dev's hands for an unspecified time.
National coins will not succeed unless they are truly distributed among the people. If it is just to the earliest adopters, there will not ever be any newer adopters. However, this can be entirely avoided. OP, could you please say word or two about what I proposed?:
A somewhat more radical approach to achieve mass adoption and fair distribution would be to avoid any airdrop at all. You could simply pre-assign an equal share of coins to every person (based on DNI or government-issued certificates): the monetary base will proportionally scale with coin adoption, i.e., no rational reason for speculative hoarding nor for dumping (guaranteed scarcity).
This can be made by relaunching without the premine and with a protocol modification instead: at any block, a coinbase can be generated through proof-of-identity, which is essentially showing an unseen ID number and its valid signature. Fraud is not possible as long as the ID issuer can re-issue certificates but always to the same ID number (yes, Spain is a tightly controlled police state). Theft is possible, but it implies stealing the certificate token and its passphrase (i.e., a full extent identity theft).
Most importantly, we do not need to check for expired or revoked certificates at mining time: we can let some nodes do the DB queries and let them issue proofs of revocation before the coinbase maturity for a small reward (to avoid spam, these proofs of revocation would need to burn some coins and be rewarded only if the miner confirms the revocation; also, blocks include only one such transaction per certificate - the rest are rejected without burning or reward).