By far my favorite scene in this entire game!
I love how intense and thrilling it is, choosing which protagonist to control and which protagonist you want to win. And it makes sense with these two specifically given their background and lore, they are part of the same model series and have similar traits and strategies… but they have opposite motivations and opposing missions, and with this choice you decide which character succeeds. Markus and Connor have a relatively big impact on each other's stories and this showdown is just amazing to watch, when I first came across this choice in particular I chose to control Markus and win the fight, it was so awesome! I love how Connor resentfully says to Markus before shutting down "It's not over, Markus… It will never be over!". The scene puts these characters to great use of story, because you have to choose which one succeeds and survives. For this very reason I actually prefer these two paths combined because it leads to the most entertaining fight in the entire game. Whoever wrote this scene sure knew how to give their audience a good show.