It's just up to you.
For some people Pepakura is harder, for others EVA foam.
Pepakura is definitely more expensive and way more time consuming.
I've went with Pepakura and I love it - it's easier for me, even if it's so much more time consuming. However, working with foam is so much frustrating for me, because I can't do something as good as I'd like, so it's so hard and so frustrating. :/
I'd say - try both ways out.