Sam,
FWIW, it’s been a few years but you are kind of comparing an apple to an orange. VO is a very nicely routed old fashioned course which I’ve played a couple of times and greatly enjoyed. The last time I was there is over ten years ago and the bunkering, while well enough placed for strategy, was of the simple oval variety which kind of belied it’s age. If they have spent money then they may have updated that but for me the way the course was laid out in a kind of old fashioned way was the best bit about it.
San Lorenzo is a bit more of a hybrid in the sense it has holes playing between housing and others that are in splendid isolation down on the water. It appeared more modern although not sure there is that much difference in age. I recall speaking to pro golfer about it and he had it as his favourite course. He didn’t think it the best or the most challenging but there was something about it that just made it very enjoyable. I think that sums it up nicely.
Conditioning aside, whichever you pick I don’t think you will be disappointed.
Niall