im not saying they are equal, but from the perspective of “whats he doing in the middle of davening” there isnt much difference. in both cases the person is saying, id rather be doing something else instead of talking to hashem.
First of all that depends on what part of davening you are talking abou. Is he in middle of shmona esrai? After and just waiting for the shatz?
Second, we do at times see in halacha the difference between stam talking and learning. There are times when learning would really be permissible but it may cause someone to think he can talk so its not allowed. A
Last, while i agree that it may be a bit of a chutzpa to learn Hashem’s Torah at a time when it’s assur to do so, you surely can’t compare a man checking his emails or playing a game with learning. Mizrach and maariv dude.