When it comes to big devices, the battery part enjoys the most important spot. Note 8 in this regard sits pretty good with its 4600 mAh Li-Ion battery. The Samsung Galaxy Mega 6.3 has a smaller 3200 mAh battery, but owing to its dual core processor and smaller display size, we think the resultant battery life in identical conditions would be same for both devices.
In my view, the Samsung Galaxy Mega 6.3 is in no man's land - it is bigger than big smartphones and smaller than small tablets. But apart from its size, its features do not warrant a price tag of Rs 30,000. In fact, better smartphones than this, like LG Google Nexus 4 and HTC One X come for Rs 5,000 less. As far as this comparison goes, Note 8 seems much better than the Mega 6.3 as the above comparison shows, apart from the display resolution and camera properties.
Having said that, I would also like to remind you that when Samsung launched the world's first mainstream phablet - Note, which has a 5 inch display - everybody wondered how it would be to use such a big device, and added that people should go for a full fledged tablet instead. Similarly, analysts were divided in opinion about the 4:3 aspect ratio based LG Optimus Vu. We will try to review the Samsung Galaxy Mega 6.3 as soon as possible; till then I assume Note 8 is a better product than Mega 6.3, which neither gives the comfort of smartphones (in terms of mobility) nor the big screen advantage of the tablet.