CPU-Z Reads it as a RK3066 with 4 cores ( I originally thought the 3066 was dual core). I have found that it performs a little better than stock g5a but this is probably due to being clocked at 1.61ghz has same mali 400. However has a few tiny bugs, but overall is now my android emulator of choice (Hooray no more is that a psvita!!!)
Excellent emulation, good screen and headphone support. Bluetooth very good. No many if any unnecessary apps from stock. System runs at 1.61 GHz and has 2gb ram confirmed with cpu-z.
Dpad is excellent no hardware mod required. Other emulators (not stock) run very well (Stock emu is game hub and is ok). Analogs are responsive easy to use. Mame4all 1.39 is very good, ps1 emulation with fpse and epsxe is very good, soul calibur plays well as does neon shadow. Sound through headphones is very good, speakers is ok, certainly better than s5800 and other JXD's
Device feels good and battery lasts ages (on first few charges battery lasted for 2hours on 41%) on average giving me around 5-6 hours with WiFi on with gaming from nes - ps1. Mupen64 Alpha18 plays very well on it however the new alpha builds are updating and improving mupen much better than the play version(2.4.4). I cannot compare this on a g5a as I no longer possess one to compare. Check the paulscode forum for more details on mupen64
It streams very well to my tvstick (MK808B PLUS). Range of WIFI is pretty good (Slightly better than JXD S5800)
Stock keymapper. Issue is to bring up the icon you shave to swipe vertically at the top or bottom of the screen and on some apps this does not bring up your key mapper icon. If you change the display option in settings it will always revert back to full screen. The solution is to hold the home button down and select the option that says display status bar) that way however this doesn't happen with a different launcher if the option is changed in settings-display-full screen mode(Select smart).
Stock emulators poor and old ppsspp version that needs root to uninstall. (NB. I use gold version and the PPSSPP emulation is very good on that as it is the latest version) If you would like me to try a particular game let me know.
No physical back button, to go back you have to hold home down then touchscreen back or swipe up if you have the correct option set on another launcher(not stock as it changes the settings back to default). Not a major issue but can get annoying.
Also i had an issue with widgets but this has disappeared since I installed apex launcher and it force closed once, but hasn't since (Nearly a week later).
I do really love it, by far the best android handheld I've had and the bugs are very few and far between(Not enough to concern yourself but I have to mention them regardless) I would recommend this device. I am still looking to post comparison videos soon just waiting for my new phone.
Hope this helps