@Rohan S , here is a details comparison (copied from Amazon.in)
COMPARISON with Honor Band 5 ●●
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1. Design section -
Honor band is more attractive than MI band due to its Curved display, when it comes to looks.
Winner - Honor Band 5.
2. Display section -
Display of Honor band is slightly more brighter than MI band 4.
Touch response is Better on MI band 4. Honor band has Laggy interface.
Winner - MI Band 4.
3. Pedometer & Workouts -
Pedometer accuracy is almost same on both the bands.
But there are twice as many workout modes on Honor band compared to MI band.
Winner - Honor Band 5.
4. HR Sensor -
Heart rate sensor is 3 times more faster and highly accurate in Honor band 5 compared to MI band 4.
* There are blackouts in Continuous HR measurement in MI band at times.
Winner - Honor Band 5.
5. Sleep Tracker -
Sleep tracker of Honor band is undoubtedly much more accurate.
Honor band also measures day time data, which isn't available on MI band 4
Winner - Honor Band 5.
7. Battery Backup -
Battery backup is indeed better on MI band, almost double compared to honor band 5.
Winner - MI Band 4
8. Accessories -
Replacement straps are easy to access on MI band and finding spares is also easy compared to honor band.
Winner - MI Band 4
9. Features -
Features are even matched on both the bands.
But Honor Band now has SpO2 sensor after update.
Winner - Honor band 5 (*after update).
10. Price -
Almost same ( *after update )
Winner - Both