When comparing Sony Xperia Ace vs Unihertz Atom, the Slant community recommends Unihertz Atom for most people. In the question“What are the best compact (<150mm) smartphones?” Unihertz Atom is ranked 6th while Sony Xperia Ace is ranked 15th. The most important reason people chose Unihertz Atom is:
It is overpowered for such a tiny device, so it will handle future applications or Android releases very well.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Headphone jack
Pro Mid class processor
It does not inlude a high-end processor so it is a lot cheaper than previous compact phones and needs less power.
Pro Front facing stereo speakers
It has front-facing stereo speakers behind its bezels.
Pro Overpowered
It is overpowered for such a tiny device, so it will handle future applications or Android releases very well.
Pro Fingerprint reader on the frontside
Easy to find and use.
Cons
Con Unavailable outside Japan
It's not available worldwide.
Con Still huge
It is still huge compared to previous Sony compact phones.
Con Tiny screen
If the screen would be slightly larger (~ 4") or if they would add a stylus the phone could be used as primary/daily phone.