Nathan i used Samsung mobile phone previously but know i am using oppo mobile phone

Reason

Camera

Samsung have more Hd then oppo but Its no need 1080 plus HD because our eyes can't recognise on small screen So oppo also have 1080 plus HD resulation and other thing If you capture photo from Samsung its take too much space like more then 6 MB Its is good for Editing in Photoshop But know a days we can't always Photoshop different picture because of time . So, oppo have Artificial recognise feature which provide extra beauty to your each photo if .its mean i give you one example If you take 100 photo from Samsung for uploading then you need to edit by application or photoshoped but when you take 100 photo from oppo your 100 photo are extraordinary brightness sharpness mean even too perfect you can't believe is that you this is artificial intelligens feature benefits
So in my point of view 10/100 to samsung in point of camera using Not picture pixel.

battery

Oppo screen technology Is different from Samsung screen technology its take very low battery consumption
In my experience i never charge oppo mobile since 2 days of using my mobile but when i use samsung i charge daily and after some time its take 2 time in single day .

Conclusion :

When we purchase new computer we see more feature and power not always IBM or HP.
My Advice is if you want to purchase new mobile just see your daily using feature .Samsung and Iphone is big brand i accept but If i talk about my self i need more feature instead of brand .