[Galaxy S 5 Q&A, Help & Troubleshooting] yetep:
Hey folks,

Before I chip in my two cents, I want to state that this is an opinion and my facts could be wrong. Please feel free to correct me at any time, but this is my general understanding on battery tech -

Batteries using current tech simply cannot be larger capacity at the same physical size. IMO (again, may be incorrect) these budget chinese brands simply won't have the funding to use any "forward" or "advanced" tech to enable higher capacity in smaller size so the trade off is either larger/thicker phone - OR as is the case in a lot of these chinese brands - a straight up lie on the capacity of the battery (6000mAH instead of 2000mAH doesn't sound unreasonable). Make sure you check, check and check again on the battery capacity before taking that as the truth. If the phone is similar size to the S5 (I haven't checked dimensions), chances are you'd be buying a relatively similar sized battery within the device. Certainly not (again, unless more expensive tech is used/created) a battery pretty much double the capacity.

Secondly - my opinion on which will be better.

2 years in tech is like 20 years in most industries in terms of how quickly things advance. Look at the change from the S3 to the S5 (or the S5 to the S7). Things (technologically speaking, lets leave design preferences to the side) there have been massive leaps in terms of the processors, battery handling capabilities, screen tech, general efficiency, cameras etc etc. The chinese "cheap" phone is likely to be as-good if not better than the S5 in most, if not all of these areas. Maybe not so much the camera, because Samsung being a company that also produces cameras has the technical know-how to make this a great area.

That been said though..

Support from developers will be short lived and small, if at all.

Future updates will either not happen - or happen once, twice if you're lucky.

If you break it, parts can be hard to source as you'll be likely to struggle to find someone that can or is willing to put their hands on and repair it.

General build quality will be comparitively worse (and yes I am referencing this against the S5 which isn't exactly known for it's general build quality).

My honest opinon - go with the S5. It's had 2 years to mature to what it is now and the dev backing is huge. Depending on the ROM you choose, battery life is likely to be amazing (in fact it'll probably be at least GOOD, regardless of ROM). The camera, generally speaking, is incredible in well lit scenarios and more than acceptable in low light scenarios. The video recording is still absolutely fantastic in comparison to other phones on the market today.

I'll update this once I've read up on the phone you're looking to buy. I own a mobile phone repair company and as a result I get a good idea of what a phone will be like from its specs etc so I'll have a gander.

>>Edit as promised.

Right based on what I can see, that phone is clearly designed based on the iPhone 5/5S model that Apple released. Not a bad thing at all, that phone is gorgeous, just saying...

It does however look pretty.. big. It looks to me to be pretty thick and that leads to me believe that their claim for the battery size is actually true. The battery appears to be taller and wider than that in the S5, plus likely is to be thicker due to the space they have in the phone.

I'm sticking to my original recommendation but that does at least clarify the claims of the battery size. You'll no doubt be happy with your choice either way though - but the S5 DOES and WILL have a much larger developer backing for a lot longer, and thats purely due to the popularity of the S5.