HTC One (M7 and M8), both are excellent smartphones, one is from last year while the other is the successor to that. In Specs Sheet, they are in their peaks at their respective years and performance-wise,they proved it as well. I am a proud owner of the M7 for nearly 14 months and I found it to be one of the best devices to have a consistent performances throughout a long period of time. If you had the money to spend for a premium hardware you can buy, I would suggest you to buy this and be a content kid.
The thing I was not quite happy about is the camera. Yes, I know, It has an all round performance,does the camera really matter? When you are an out goer, it does. HTC one Ultrapixels is a new logic which has improved low light photography and helps in capturing more light in to a photo. This is all well and good, but the downside is, the lens are grown in size and occupy a bigger portions and that’s the reasons why adding more pixels is kinda of a problem. Since less pixels,the picture is not at it’s best while zoomed. My personal problem with the M7 was the purple tint which i had during average or low lights. I checked multiple service centers, they told me it’s due to heat to the lens or maybe it’s a regional problem,but other than that,in bright light,the picture comes out well and it is quite nice at times. It has a brilliant Front Facing Cam which is loved by all the HTC users and it is really handy for me in Snapchat and Instagram for better pictures.
Overall, It depends on the user. It is reported that the Purple Tint is not found in the M8. It may provide average camera hardware,but still has one of the best Camera UI and the filters are simple and enhancing.The after edit is quite handy and makes up for the loss of those extra pixels and help in multiple ways. If you are much a social media person,the HTC One Camera tricks and features are more than enough to keep you busy. If you are looking for a more professional side, this is not the best option for you. Thanks!