Shinjuku or Shibuya in Tokyo? which would be better to stay for two 21 year olds for 12 days?

Question:

Answer:

Both are very nearby to each other, you can easily commute by the efficient train services.
Since you guys are only 21, I would prefer Shibuya instead.
Reasons are that Shibuya caters to younger people and there are much more things to do and see.
The food prices and the accommodations are also slightly much cheaper than Shinjuku.
If you like to be fashionista and also enjoy a super night life, Shibuya is the place to be......