I have Redmi Note 3g and Note 2 prime .My Antutu test is 32K for note 3g and 49K for note 2 prime. What do you think ? Camera wise I believe both use the same parts from Sunny Optic , China , another word Samsung or even Meizu phone are better. It's just my personal judgement. Some may not agree.

If you really need a decent camera, I suggest you Mi4i lah. Easily one of the best camera out there for the price tag.
It has extremely capable Sony's 2014 flagship IMX214 sensor (the same sensor found in Mi Note, Mi4, Oppo Find 7, One Plus One...etc) with matured algorithm by Xiaomi.

I, myself find Mi4i did excels in camera department. In fact, camera is Mi4i's highlight.
Even outshines Mi4 especially in low-light with its true dual-tone flash.
But Mi4i, like any other Mi series has no micro sd slot, so 32GB is the only option for you if you need huge space.

I'm not sure which sensor Redmi Note 2 is using, but I know Redmi Note 4G and Meizu M2 note are using mid-tier Samsung BSI sensor. If I'm not mistaken, Redmi devices never had Sony made sensor for its rear facing camera. Only Mi flagship series gets it.

GSMArena Mi4i Camera Review

Hi pac1 , the picture quality is just slightly less better than the Meizu. For general photo shoot , it's still OK. You should check out the Xiaomi mi4 if you insist on good photo shoot. Now the price had gone down.

* I use my Nikon DLSR for serious photo shoot.