Hello,
I've been researching the 8100/8300 for awhile now and can clearly say that I'd rather put a 8300 into my build versus the 8100.
Don't care to much for the 100mhz but, the bump in cache is worth it to me, we can call the 100mhz a bonus.
Seen a few videos that compare a 6MB-L3 & 8MB-L3, one video showed a 5-6 frame bump over the 6MB L3.
In our current game market, four cores are enough, 3.7Ghz is respectable and 8MB-L3 is a logical investment.
Sure it's not for everyone, some people will catch the power bug and will reach for that 8350K. Some will bump up to the i5-8400 (ideal in my mind), for the increase in cores, ram profiles and turbo boost.
Final thoughts - The 8300 is ideal for a entry-midrange build. I'll be pairing mine with a Gigabyte 1060-6GB and Gigabyte B360N WiFi for a mini ITX build.