This is a very nice battle, and i will explain why. (long post ahead)
Touichiro, the final villain from MP100 Season 2, and Tetsuo are both proud and arrogant, the first one genuinely believes himself to be the strongest or worthiest man there is. He travelled all around the world, challenging many people and presumably other espers fully cementing his self-confidence.
While Tetsuo on the other side has an inferiority complex,who leads to the superiority complex he develops after obtaining his new found powers.Tetsuo is unstable psychologically and more prone to losing control as he feels the need to prove himself to the world, and his reason for killing kaneda is mostly for his ego, who was wounded by always feeling inferior to the latter.
Considering they start out pretty similar in raw power, the fight starts with their powers more or less evenly matched, until Tetsuo begins overexerting himself and ssurpassing mob, who notices his growing power through his Extra sensory perception and now cornered enters his 100% state, similar to the fight against Touchiro.
From here on out he gets a huge power boost, allowing him to get a very comfortable position in the fight, also, his empathic manipulation/psychic energy absorption null Tetsuo's chances of harming him at this point, as he will be able to understand Tetsuo's mental unstability he tries to convince him though words and his own empathic manipulation into giving up
This leads to two scenarios:
1st. Mob stops his unstability by going 100% kindness/ gets him to give up with talk no jutsu and stops his outburst. (voided by SBA and duel rules)
2nd Mob tries to stop his unstability wich only causes Tetsuo to get even more out of control and start entering his Flesh form. Mob notices his power is growing dangerously and talking him out is useless, then goes full resignation and rips him apart entirely with his TK before he can overpower him or go for absorption
Mob FRA