When comparing Bose SoundSport (SIE2) vs Bose QuietControl 30, the Slant community recommends Bose QuietControl 30 for most people. In the question“What are the best headphones?” Bose QuietControl 30 is ranked 34th while Bose SoundSport (SIE2) is ranked 157th. The most important reason people chose Bose QuietControl 30 is:
You can get around 8 to 10 hours of use from a full charge.
Specs
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Pros

Pro Engineered for exercise
The SoundSport earpieces are designed to stay in when running or performing other intense activity.

Pro Choice of color (iOS only)
SoundSport earbuds with iOS controls are available in blue, green and orange. The Samsung Galaxy (Android) model comes only in green.

Pro No ambient sound isolation
Because these earbuds are intended for exercise, they let in outside sound so users can remain safe and alert.

Pro Hydrophobic housing
These earbuds are covered in hydrophobic cloth in order to keep sweat or rain out, while still letting sound pass through.
Pro Good battery life
You can get around 8 to 10 hours of use from a full charge.
Pro Earphones stay in place well
The earpieces won’t easily fall from your ears when using these on the go. You get Bose’s StayHear+ wing tips which securely fit inside the ears. Also, since the noise cancelling electronics are in the collar instead of an inline module, there is not a lot of weight that pulls down on the earpieces.
Pro Very good noise cancelling
While the noise cancelling does not eliminate all of the ambient noise, it does a good job of preventing most of it from mixing in with your music. With the audio turned up to a good volume, you aren’t likely to hear your surroundings except for the loudest of sounds.
Pro Adjustable noise cancelling
You can dial in the level of noise-cancelling that you want using the Bose Connect app which is available for Android and iOS. This gives you more flexibility with active noise cancelling compared to other earphones.
Pro Full sound with good detail
The bass of the Quiet Control 30 sounds full, with good punch and power. It doesn’t add any bloat though, preventing the sound from getting too muddy. The mids are quite forward with a slight boost. Vocals and guitars can easily be appreciated, though heavy guitars may sound quite aggressive due to the slight elevation. The highs are clear and offer a good level of detail yet do not get harsh in any way. These earphones are good for general music listening, and should excel in vocal-heavy tracks.
Cons

Con No ambient sound isolation
By design, these earbuds do not obstruct outside sound, making them inappropriate for use when isolation is desirable.
Con There is no way to secure the earpieces when not in use
The earpieces will dangle off of the collar and flop around when they are out of your ears. There are no magnets in the ear pieces to keep them together, and there are no fasteners or docks in the collar to secure the earpieces. Other collar style earphones have this feature.
Con Bluetooth only
You won’t be able to continue using the QuietControl30 when the battery runs out. You only get Bluetooth connectivity, with no wired option, so you’ll have to charge these earphones in order to use them again.
