MacBook Pro late 2013 (ME864) vs 2014 (MGX72)?

Question

macbook

1) MacBook Pro late 2013 (ME864)
- 4Gb RAM
- 2.4Ghz CPU
2) 1) MacBook Pro 2014 (MGX72) -
8Gb RAM
- 2.9Ghz CPU
the reviews I found on the Internet are just lewdness written by apple-philes, and I want an objective assessment against the background of the previous model.
Q: How different will the performance of these two MacBooks be?

Answer 1

if both do not have an SSD, then 1) it will slow down
ps applephiles write the truth

Answer 2

Taking into account the fact that new retinas are difficult to upgrade, it is pointless to take a model with 4GB of RAM now. Take strictly 8GB. You can even have a simpler model with 2.6 GHz (the youngest retina is 2014).

Answer 3

Approximately 7.85 percent.