neither.
both using mtk chipset, in other word, chinese made crap chipset.

then those lenovo phones suites u well already.
got big screen, big battery and fairly cheap too.
anyway between both the lenovo u listed, the P780 got higher capacity battery so its safe to assume that it would give u much longer battery life than the S920.

Strategy Analytics said
u do realize it a random article without any backup right ?
please don google " mediatek xxx thrid xxxx " and use random article as source , that isnt the way .

And why keep edit your post . Just now 2nd , now 3rd . I guess 20th is a legit place .

Anyway , for you to think a company which produce only cortex A7 chip can be on 2nd largest manufacturer is quite a funny statement . It surpass Intel or qualcomm ?

He mean mediatek is bad as it using A7 architecture which i agree with .
However if must choose between that two , i would choose the one with larger battery

And for the price range ( i assume about RM1000 )
perhaps galaxy s3 is better 
Or xperia sp 

mediatek chip during dual core times is quite bad, slow and lags.

but now with it's quad core, it is much improved. performance, speed and stability. and it's up coming 8 cores chip would be rivalling of Snapdragon 800 speed.

you can either stuck in the past of join in the new wave.

I have been using Dual Core Motorola for quite some time. Never notice what is called Drag.. it does what I needed to do. Pain these days is battery life, hopefully this Lenovo can help me with that.

I am leaning towards P780 too .. anyone you know using this ?

I need to know if the phone has Orientation sensor. I have a need for it.