The HTC Butterfly S

The good: The HTC Butterfly S boasts a 3,200mAh battery and a half day of uptime, a powerful processor, and a brilliant screen. Its camera performs well in low light, and a microSD card slot offers the option of adding more storage.

The bad: The glossy plastic materials of the HTC Butterfly S lead to lots of fingerprint smudges, and the phone isn't water-resistant like its predecessor.

The bottom line: If a faster processor and bigger battery trump a sexy metal design, then choose the HTC Butterfly S, otherwise skip it for the HTC One.

The HTC Butterfly S packs better specifications compared with the HTC One, but it doesn't have the great industrial build. If you're the type who prefers the fastest hardware, then the Butterfly S is the one for you. Otherwise, stick to the better-looking flagship One.

Announced in Taipei and targeted at the Asian market, the updated 5-inch smartphone features a faster 1.9GHz quad-core processor, the Ultrapixel camera found on the HTC One, and a much larger 3,200mAh battery. While it looks somewhat similar to its predecessor, the original HTC Butterfly, HTC has breathed new life into this handset with front-facing speakers and a fresh helping of Android Jelly Bean and the Sense UI.

Design
The HTC Butterfly S doesn't deviate much from the original Butterfly handset. The design of the Butterfly S remains pretty much unchanged, except for the additional front-facing BoomSound speakers like on the HTC One. This is a good design effort by HTC, as it makes sense for the audio to be directed straight toward the user rather than from the rear or the sides where it can sound muffled.