The GPU doesn't matter much for AE (unless you're using the ray-traced renderer or third-party plugins - details here: GPU (CUDA, OpenGL) features in After Effects).
It does matter for Premiere!
As long as you upgrade the RAM, the specs you've listed will be okay with AE.
How about giving us a model number so we could do more than guess. Generally ASUS ROG laptops are ideal for great for video editing but without a model number it is hard to give you a real answer. I have one and love it but without some idea of your media and hardware details you can only get general comments.
asus rog g751jt-ch71
That is a great unit. The first thing I would do is put in a Samsung 850 Pro drive and clone the OS/Applications to the SSD and swap it with the Hard Disk drive and then since it has two open slots upgrade the memory to the full 32 GB.. If you want help with those two upgrade options let me know, it is very simple
I was kind of hesitant because the geforce 970m is not on Adobe's list.
I'm also looking at:
HP ZBook 17 G2 Mobile Workstation - Core i7 4710MQ, 2.5 GHz, Windows 7 Pro 64-bit, Windows 8.1 Pro downgrade, pre-installed: Windows 7, 8 GB RAM, 1 TB HDD, DVD SuperMulti, 17.3" 1920 x 1080; NVIDIA Quadro K3100M with 4 GB dedicated GDDR5 video memory; Model#: K4K43UT#ABA
Xi PowerGo 15/7 17.3-Inch CAD Laptop 0034-002
Intel® CoreTM i7-4810MQ 2.8/3.8GHz-1C Turbo Boost- 6MB Cache Quad-Core/8 Threads 4th Gen. 22nm
NVIDIA® Quadro® K3100M 4GB GDDR5 VRAM Kepler GPU w/Optimus Technology
17.3" 1920x1080 Full HD (16:9) LED Backlit FHD/Matte Type Display
1TB 5400 RPM SATA 6Gb/s Seagate® Solid State Hybrid Drive with 64MB cache 8GB MLC SSD NAND Cache
Standard Features included: —— Intel HM87 Express Chipset, — Dual Channel DDR3L Expandable up to 32GB 1600MHz, — Built-in Card Reader, — 1x USB 2.0, — 2xUSB 3.0, — 1x HDMI 1.4a (with HDCP), — 1x Display Port, — 1x mDP Port, — Built-in Camera,
Also the Dell Precision 6800
Both those units have Quadro's. Go for a GeForce GTX