I'm comparing the UE Boom 2 with the Soundlink Mini 2 by Bose. There's a lot of similarities. They're both bluetooth speakers, priced roughly the same, produce quality sound from a compact body, charges through micro usb and both have auxiliary inputs. And that's where the similarities end.
The UE Boom 2 is very "grab and go". The form factor feels like a water bottle. I feel very confident tossing this in a backpack. It's rugged and waterproof. The large volume buttons and tap to play/pause and skip feature works great in the shower.
Rubber flaps protect the USB and Audio port from moisture. The fold out ring allows you to hang it from just about anything. It can also be entirely removed and mounted to a tripod screw.
I carry this around the house either by hand or using my trusty beverage caddy. It can even fit in some pant pockets. And because its waterproof, I have no fear of using this in the kitchen or bathroom. I use it for music, podcasts and watching Youtube videos.
The sound quality is very clear, pumping out sound from all directions. Although, it could use a little more bass. But luckily there's an app for Android and iOS were you could tweak the EQ a bit. The app also displays battery life, can remotely power on or off a device, and can be used to pair up another UE speaker to "double up" the sound. Overall, very flexible and easy to use.
Now onto the Bose SoundLink Mini 2. I found a much different use for this little speaker. Although it's technically portable, it doesn't have the same "grab and go" feel of the UE Boom 2. It's heavier and just feels more delicate. Then again, the extra weight equates to a bolder sound.
I personally use it as a wireless speaker for my TV. The sound is impressive during movies and has nice, strong bass. Unfortunately, there's no app or physical way to adjust to the EQ.
I love being able to place this speaker nearby and hear everything clearly - without having to crank up the the volume. Only downside is there's a 200 millisecond delay because it's transmitting through bluetooth. It's barely noticeable. Having the ability to move the speaker around freely with that sound quality makes up for the slight delay. BTW, I recommend using a low latency transmitter (preferably w/ aptX technology). That'll help minimize the delay.
The charging cradle is very convenient. No fiddling around with cables. Just set it and forget it. Although, placing it just right to charge could be a little smoother. Placement is a surprisingly finicky and not being able instantly tell which way the speaker is facing is an unfortunate (but minor) design flaw. But all in all, its has a clean, handsome design. Looks great on a table or counter and fits right in with any entertainment system.
Both speakers can pair up to 8 devices. When the UE Boom is connected, it makes a drum noise. While the Bose actual says the name of the device it's paired with.
I can't honestly say which is "better". I really like them both for very different reasons. One is like a hiking boot: Very rugged, ready to go anywhere - anytime. The other is like a fancy dress shoe. Elegant style, premium fe and used for special occasions. You can't go wrong either. Both are well made, have lots of features and produce great sound!