Seriously? I'm on a 2013, and the specs of the latest machine are already "nearly similar". I have factory SSD flash storage and 16 GB of RAM. The CPU and GPU upgrades haven't been remotely worth upgrading to.
How can you be on a 2015 MacBook, talking about upgrading to a 2016? Nobody cares whether you own the latest gadget; upgrades should wait at least 2, usually 3-4 years. I'm not talking about the severe case of frugality (use the same laptop for at least 8 years until it dies!). Just basic common sense.