I have played this game in my mobile phone and in my PC.
I gonna tell my gaming experience on both devices .
First
Keyboard and mouse:
Advantages:
1) better graphics and game experience.
2) less lagging .
3) no need to run for changing wire .
4) easy to drive tanks .
5) quick response can be possible.
6) switching ammunition is too easy .
7)more noob players .
Disadvantages:
1)big aim time circles .
2) auto aim won't work .
3) shooting targets from low range in a problem .
4)game suddenly close in between the battle( may be a bug but now it's fixed in update 3.0).
5)have to wait 2 Min or more to participate in a random battle.( U can't play with tier9 or above tanks battles )
Touch screen devices:
Advantages:
1) less aim time to shoot .
2) playing medium tanks with least distance is possible .
3) auto aim can shoot accurately for small ranges .
4) less waiting time to get into a battle.
5) less bugs and problems are solved in every new update immediately.
6)can able to carry any where and play any time .
Disadvantages:
1) the device get heated alot and you have put it in refrigerator to cool it down .
2) have to put the device to charger and play to avoid shutdown.
3) quick response is not possible.
Share your experience friend .where you feel more comfortable to play .