Not applicable
Galaxy S

1 great camera features that is pro mode video recording,  slide to zoom with  shutter button 

2 single tap mode 

3 tap heart rate rejection 

4 edge lightning durring music player and calls 

5 better battery optimisation 

6 performance mode styles 

7 best camera quality even without night mode 

8 hiding navigation button 

9 color changing navigation button 

10 ar emoji was well optimized 

11 Bixby 1.0  great 

12 Bixby button completely disabled button 

13  coloring the ui was easy 

14 fun to use the experience ui 
These feature were great in oreo android 

Pie android with one ui 

1 easy for one handed operation 

2. Gesture navigation was clunky 

3 no pro mode video 

4 no digital wellbeing 

5 no single tap mode 

6 night mode was available to some apps 

7 night mode introduced 

8 camera quality was way more degraded 

9 animation was very clunky 

10 good lock helped a lot for customizing the ui 

11 slide to zoom is no longer present 

12 over all this one ui 1.0 is still great but lack of features given me disappointment 

13 super slow motion feature did have 2 switching styles one is 960 fps for .2 seconds and .4 seconds at fps of 480 , and 120 fps video is also available 

14 Bixby become useless 

15 although button customization is also available so I changed it for launching camera 

16 scene optimizer introduced, 

17  flaw detector introduced 

18 recycle bin was introduced for gallery app 

19 dex mode can be done with hdmi cable no need for the dex pad for that 

20 battery optimization became very bad

21 bixby vision and reminder improved a lot in this 

22 over all the ui was fresh and clean look I really like one ui it did changed my was of using my device 

But dissatisfaction came with removal of features 

23 dual audio enhanced a lot both in sound and bass 

24 speakers sounding great 

25  keyboard can be touched with the bottom bezel 

This was android 9 with one ui 1.0 

Android q one ui 2.0

1 visible changes is impressive 

2 camera quality improved a lot 

3  all camera modes integrated on the grid that is way better 

4 sence optimisation  improved a lot 

5 night mode for both front and back with the ability to zoom in or out 

6 call pop up minimizes further 

7 digital wellbeing and focus mode and wind down mode is awesome 

8 new dex mode with single usb cable what to say about it  now I have the ability to do both wireless dex and wired dex but unfortunately I prefer the wireless one 

9 sound is little bit degraded I hope stable will solve this 

10 app timer is also use full 

11 gesture navigation this one is my favorite what a smoothnes this gesture navigation ability to switch different apps like pure iOS  is wonderful 

12 as above mention those removed features there is further removal of features is the button grid they removed it 

13 dark mode for all apps now available except the what's app🤬🤬🤬

14 Bixby vision further enchants with make up setting girls will like this the lens has all integrated features as before there was several lens to choose now it is integrated in one the vision will determine the things automatically like the sence optmisaer 

15 aesthetics changes like the noti bar changes 

16 100 wallpaper for home screen 

17 dynamic lock screen 

18 dark mode for wallpaper 

19 media and devices replaces the setting of dual audio feature 

20 volume panel is still on top 🤬

21 further the hardpress vibration is no longer supported only on off screen it is supported 

23  focus mode is use full

24 dnd dont not disturbed changed with three mode 1 until I turn off,  dnd with duration and turn on as scheduled 

25 wind down mode is really helpful 

26 sensors off except fingerprint and hard pressed reset all sensors are off while enabling it 

27 location access only when app is used 

28 revoking permission is very easy 

29 rotation of screen has gone in another level now every corner 

30  video editor from note 10 added 

31 now there is ar doodle feature in gallery app 

32 trash feature for every files app like contacts,  files 

33 reminder now have the feature to stick on aod 

34 icons can be changed through developer option 

35 native screen recorder added 

36 dual audio moved in media and devices 

37 adaptive power saving added 

38 cursor control through holding the space key 

39  media volume limit setting through bluetooth 

40 battery optimisation fixed 

41 one handed operation is easy to do

42 assistant launched through side of the edge 

43 android auto preloaded 

44 enter biometric in app  has been increased security with confirmation pin password etc before entering any details through apps like Samsung pass 

45  tips and tricks added on setting and device care

46 callender now supports stickers 

47 now you can adjust the snooze notifications options off or on depending upon your preferences 

48 lock screen shortcuts has new setting 

Over all android q is the fix to android pie 

These all are changes in oreo to pie to q