How to break this perception that my research trajectory will be almost the same as my research senior’s?
I hate to break it to you, but after a (very) short time in grad school, once you start making a name for yourself, people will predict your trajectory based on how they perceive you are doing right now in grad school, not based on your previous school and certainly not based on a self-assessment of your work ethics. If you have been there for a non-trivial amount of time, and nobody thinks that you will do exceptionally better than everybody before you, consider that this assessment may be more realistic than your rather rosy outlook.


  How to break this perception that my research trajectory will be almost same as my research senior's.


Easy. Achieve substantially more impressive results than your peers in the same career phase. If you can't do this easily, what makes you think you will certainly do much better than them in latter career phases? If you think you have truly impressive results but everybody else in your institution does not agree, your problem is much deeper. Then you are either surrounded by people who can't see your potential and vision, or you are yourself blinded by arrogance and can't see when you are wrong. Both of these options are pretty bad.