Well, you can install launcher to Mi3. So its same as AOSP + launcher. So I'm not sure what you're getting at? 

May i know what is AOSP?

How to tell an AOSP ROM from TouchWiz/Sense/MotoBlur ROM?
AOSP ROMs usually ship with its own “vanilla” launcher that looks like Android original launcher.  This may include launchers like Trebuchet (for CyanogenMod) or just Android Jelly Bean launcher.

Of course, some non-AOSP ROMs also ship with Nova launcher, which may fool you into thinking that its an AOSP ROM since Nova launcher mimics the Android “vanilla” launcher.

Another way to tell an AOSP ROM from TouchWiz/Sense/MotoBlur ROM is by the size of the custom ROM zip file.

Most AOSP ROMs such as CM10.1, AOKP, or ParanoidAndroid are less than 200MB on average in size (size of ROM zip file).

TouchWiz, Sense, or MotoBlur ROMs are usually bigger than 500MB on average and most near 1GB.

Why the big difference in size?

Well, that’s how much bloatware Samsung, HTC, and Motorola adds on to the existing AOSP code.  Everything including UI, features, sounds, and carrier-dependent apps add up to more file size.

That doesn’t necessarily mean non-AOSP ROMs run slower but in most cases, AOSP ROMs do run faster than non-AOSP ROMs since they don’t include the extra stuff.

Is AOSP ROMs better than non-AOSP ROMs?
AOSP ROMs may be better than non-AOSP ROMs but that all depends on your preference.

For example, if I installed an AOSP ROM like AOKP on a Galaxy Note 2, my phone would probably run faster.  But the downside is that I would lose all Samsung features like Multi-window, Smart Stay, Smart Rotation, TouchWiz, and anything that was added by Samsung.

If you enjoy some of the Samsung features, AOSP might not be the best for you as it will not let you use some of the features your phone came out of the box with.  On the other hand, you might enjoy AOSP more if you decide that you don’t need any of those Samsung features.

So, it all depends on the user, you.  Whatever feature you want, either AOSP or non-AOSP ROMs will have it,  you just have to decide what you want.

Personally, I enjoy both AOSP and TouchWiz.  There’s always advantages to running AOSP or non-AOSP and it just depends on the situation.

My advice?  Try both AOSP and non-AOSP for a week and decide for yourself.

And if you don’t have time to root and install custom ROMs on your phone but you want AOSP, you can get a Google non-branded phone like the Nexus 4.

android open source project. It's the base for android ROM. correct me if im wrong. 

Are ASOP similar with IOS?

For Mi3 or MIUI, nothing much to learn about ROMs, most likely no custom ROMs for Mi3 in the near future 

With S4 one definitely needs to petty in monitoring ever drop of battery juice..lol

Been using MiKey for 2 weeks, seriously can't see any differences in battery life.

3050mha vs 2600mha battery mah..

I always remove mikey from active program and keep the option running in background (in Mikey app) off. I understand the process MUST run if mikey, that's expected.

As for battery optimization, I think MI3 screen whack a lot more juice off when compared with S4, thus if no use phone screen, MI3 will have more juice but if use it at same screen time as S4, its gonna go down way faster (I attribute that to AMOLED black pixel no use power).

So having a 3K mah battery is not a major advantage over S4 if both uses same amt of display time, that's my 2 cents.

Don't want to root. Prefer stock coz no want to mess with system. Too many data in my phone now, even stayed with 4.3 coz 4.4 kitkat need factory reset to run smoothly.

Greenify need roots although non-root version working but still only in early stage. Wonder tho, whether my batt is degraded.

actually the purpose of root is to access the system files?

greenify unwanted apps? like??

i am amazed by some of his followers who propose him to be TS ....someone who flouted the rules?

I have been working so hard and diligently to protect this thread from being move back to kopitiam. I have also contributed so much since the beginning of this thread...is ok some of you dont appreciate my efforts. Nevertheless all these nasty remarks from you will become my positive energy for me to provide a better thread here and more improvement coming along....stay tuned guys!

not understand. when not using it then? remove from memory?