Bose Ultra Open Earbuds vs Sennheiser Momentum True Wireless 4

What Ultra Open Earbuds does better (1) and where Momentum True Wireless 4 wins (2) — every spec side by side.

4.5Score

1 advantage≈ $190

6.4Score

2 advantages≈ $170

Higher score

4.6Noise control & calls5.2

4.8Battery4.4

Why is Ultra Open Earbuds better than Momentum True Wireless 4?

Specifications

Only differences	Bose Ultra Open Earbuds≈ $1904.5	Sennheiser Momentum True Wireless 4≈ $1706.4
Sound
Fit	In-ear	In-ear
Ear cup design	Open-back	Closed-back
Driver type	Dynamic	Dynamic
Driver size	—	7 mm
Lowest frequency	—	5 Hz
Highest frequency	—	21,000 Hz
Sensitivity	—	107 dB
Hi-Res Audio	—	Yes
Adjustable equaliser	Yes	Yes
Noise control
Active noise cancelling	No	Yes
Adaptive ANC	—	Yes
Transparency / ambient mode	Yes	Yes
Microphones	—	3
Noise reduction for calls	—	Yes
Battery & charging
Battery life	7 h	7 h
Battery life with ANC	—	6 h
Total with charging case	27 h	30 h
Charging time	1 h	4 h
Quick charge (claimed)	—	8 min → 1 h
Fast charging support	—	Yes
Wireless charging (case)	—	Yes
Connectivity
Wireless	Yes	Yes
Bluetooth version	5.3	5.4
Bluetooth codecs	aptX Adaptive, SBC	aptX Lossless, aptX Adaptive, aptX, LC3, AAC, SBC
Hi-res codec (LDAC / aptX HD / LHDC)	Yes	Yes
aptX	Yes	Yes
LDAC	No	No
Multipoint (two devices)	Yes	Yes
LE Audio	—	Yes
Auracast	—	Yes
USB-C	Yes	Yes
Smart & streaming
Voice assistant	—	Alexa, Google Assistant
Design & build
Earbud weight (each)	—	6.2 g
Protection rating	IPX4	IP54
Water resistance (IPx)	IPx4	IPx4
Dust protection (IP)	—	5
Colours	—	Black Copper, Black Graphite, Denim, Gold, White Silver
Features
Touch controls	Yes	Yes
Hands-free calls	Yes	Yes