Originally Posted by BarryNL
I would normally expect APA to be entirely Pale Malt (which is basically just another name for Vienna)...
I'm not entirely sure that's correct (though I may well be wrong, so please correct me on this if need be). But my understanding is that pale malt could be any grain with a low color rating, including standard 2-row or something with a little more body like Maris Otter or Golden Promise. Vienna has a little more maltiness to it than standard 2-row, so whilst you could use Vienna as the base malt for a beer, it's not just "pale malt" - it's more substantial than that. As for the OP's question, I think either grain would work well. Pilsner gives a much lighter beer, whereas Vienna gives a tastier, fuller beer. In the proportions listed, either would work well, so I bet that the end product will be a damn fine beer.