Just that really..
I've had a brick for a phone for years (Sony Ericsson C510) Does what I need, unlimited texts with £10 credit per month on T mobile. Don't ever use it for calls, I have a house phone for that, don't use it for internet, I have a laptop for that
It has a half decent camera/video which I use now and again, but I do have a good camera for that!
Anyway DH says do you want a phone for your birthday? We're getting behind the times and don't want to be stumped with technology in future, we have to catch up!
I'm not an old fuddy duddy with no clue no offence I will have no problem getting used to an up to date phone within a few weeks. I was looking at these two phones and I'm leaning towards the HTC one. Anyone have experience of either or preferably both? Pro's/cons welcome! 
TIA