Neither. It is not going to matter one way or the other.
lol...

always have a post workout shake asap after training...the most critical nutritional period for muscle growth is the postworkout meal.
you also want to make sure the shake has the proper ingredients to take advantage of the post workout window of opportunity.
50g protein...hydrolyzed whey is the best
80-100g simple carbs....depending on your bodyweight and if your in a bulking or cutting phase...glucose/dextrose powder
use plenty of water
for an even better shake you can add some creatine, glutamine, bcaa, and vit c.