Android phones, apps and tablets

Is it better to find a used N4 or go for a Moto G? Friend has too many problems with his One X (sim card not reading, signal issues, overheating, regularly crashing and rebooting) and wants to buy something unlocked.

Full spec comparison:
http://www.gsmarena.com/compare.php3?idPhone1=5048&idPhone2=5831

Key stuff:
N4 has a higher spec chip:
N4: Qualcomm APQ8064 Snapdragon, Quad-core 1.5 GHz Krait CPU, Adreno 320 GPU
G: Qualcomm Snapdragon 400, Quad-core 1.2 GHz Cortex-A7 CPU, Adreno 305 GPU
**N4 has 2GB RAM, G only has 1GB[b]
N4 will do Dual Carrier HSDPA, so max speed 42 instead of 21 Mbps
Both can be a wifi hotspot and will do Wifi a,b,g,n (not ac), but N4 has 2 wifi antennas, so for 802.11n wifi it can theoretically do 300Mbps vs G's 150Mbps.
G can receive FM radio, N4 can't.

[b]Everything else, in order of my estimate of importance:**
Both have Bluetooth 4 with Audio support, but the G supports BT4's Low Energy mode, which can be handy if you use devices like HRMs, pedometers etc.
G has Corning Gorilla Glass 3, N4 has CGG2
N4 has an extra HSDPA band at 1700
N4's stock OS should support DLNA media streaming.
Both have USB2, but N4 uses SlimPort (one way of getting HD video from a phone to a screen, MHL is the more common way), and G claims USB Host support.
N4 camera outputs 8MP, G camera outputs 5MP. Both are shit.
N4 can capture 1080p, G captures 720p. Both @30fps, probably equally shit.
N4 has NFC, G doesn't.

TLDR:
G will be noticably slower, mostly because of the RAM, but its 2070 MAh battery will last longer than the N4's 2100MAh, especially if the N4 battery is 1 year old. Neither battery is removable.
A new G will be easier to replace on warranty if something goes wrong without a dramatic event.