PIPO M9, M9 Pro, 3G or WiFi Version, Which to buy?

As one of the best selling android tablet, pipo m9 is still the "super star" product among the incomputable android tablets thought at least six months has passed since pipo m9 was launched! Along with great responce from customers, pipo continued its developing on this model. Pipo released 3 different versions of it at the following several months, 4 version in all:
1. pipo m9 wifi version
2. pipo m9 3g version
3. pipo m9 pro wifi version
4. pipo m9 pro 3g version
The only difference between m9 wifi version and 3g version is if it supports 3G module, so is pipo m9 pro! So have you decided which to buy? Here is a tutorial to lead you to find the right one for you! Let's focus on this photo:
It's directly proportional to price and specs generally, we can find it from this comparision. The 3G module is worth of about $40. But apparently it has a powerful hardware, which dicides it price, even if the cheapest pipo m9 wifi version! It's featured with a 10.1 inch IPS screen, 1280 x 800 pixels is familiar if you often read news about Samsung Galaxy Tab. Its power comes from a RK3188 ARMv7 Cortex-A9 quad-core chip based on leading 28nm tech. CPU working frequency runs to 1.8GHz.GPU: Mali-400, pipo keep this in all models, I think that can reflect the good performance of this ARM product! 2GB ram is the standard, that exists in all models, which insures the fluent running persormance and 2GB ram is also the tag of high-end tablets!
So which will you buy?
Screen:
Pipo m9 pro get a updatiing on screen pixels, which is improved to 1920 x 1200. That can bring you better visual experience! But its cpu frequency is 1.6GHz max, lower than former 1.8GHz. Compared with pipo m9, m9 pro supports A-gps, GPS function, that's a important factor many customers care! 5mp rear camera, 2mp front camera, pipo didn't change anything while the updating!
Battery of m9: 7800mAh
Battery of m9 pro: 7600mAh
I get a confuse, why? Sorry, I can not answer you, maybe 3G module saves more power! All the difference of pipo m9 and pipo m9 pro are there, you can make your decision after scanning the comparision photo 3 or even 4 times! Expect that my words is useful to you!