Benchmarks are fun & all, but what most people want to know is how their system performs in the real world.
Here’s a quick video to show the difference in performance between the NUC5PGYH and the NUC5i3RYH. The PGYH (left) is shown as it arrived (2GB RAM, 32GB eMMC, Windows 10, clean install), while the i3RYH (right) is shown in a fairly common configuration (4GB RAM, 180GB Intel SSD, Windows 10, clean install). No peripherals or devices other than the keyboard/mouse receiver are attached to either.
I doubt the extra RAM matters in booting to the Windows desktop. Other than that, you can see what the extra money is getting you with the i3. Whether the added cost (and work) is worth it is up to you.