I don't have the pro but I will say this,the Diamond is very compact to carry in the pocket. This is coming from a guy who NEVER carried a phone in his pocket. I always used a clip on my waist to carry previous phones for the past 10 years. So I would say for the ease of carry, the Diamond is the way to go. Obviously, if memory is an issue , then the Pro is the phone of choice. I have also heard about the build quality of the Pro being an issue. The build quality of the Diamond is excellent. One small issue I have though is that sometimes when I remove the Diamond from my front pocket, the cover jars lose. That is to say it unclicks at times.Battery time is an issue but I solved that problem by carrying a spare OEM battery
