Exynos is 64 bit, but Samsung locked it to 32 bit before releasing 5.0 (ive read somewhere but forgot where)
Mine is Exynos version and no issues so far, loving my phone
It's damn good, depending on each user as each user's needs are different from one another.
For me I don't have complaints about it, gaming is good, no overheat issue, no lag, nothing
Exynos or Snapdragon is up to personal preferences anyways...

Just my two cents

White is pure and sweet
Pure evil too, hehe

I know this has been asked several times before
Is art and dalvik any different in daily use?
Any significant improvement on battery life or any changes?
For 4.4.4. i mean