Questions about the Nether and Railcraft.

[Zerosan]

Well yea, just pointing out you'd still end up in the nether to do it~

Well, the method of retrieving netherrack does put less of a load on the server/client due to fewer chunks needing to be kept in memory,
so, if you tend to have a lack of memory, frequent lags or anything along these lines, the netherrack method most probably is the better way to go, it's more lightweight.