Selena Halcyon
Jedi Master
Even your own description is not analogous to Kylo. Parentage is a stupid basis for comparison because it is so basic. We could get more specific with family if you want. He has no twin nor a younger brother. He also was not trained specifically by Luke, but instead by Luke's wife Mara.
Jacen doesn't take control over an imperial remnant. He takes over the Republic. He literally is basically the second emperor.
Kylo never did anything with that Star Destroyer which seems to be under the control of Hux, who is at least on the same level of Kylo if not higher. Furthermore we have nothing to say that it is unique or customized.
The reason for his family issues are drastically different and the nature of them.
You also ignore the core reason for Jacen's fall with was a twisted sense of altruism.
Jacen doesn't take control over an imperial remnant. He takes over the Republic. He literally is basically the second emperor.
Kylo never did anything with that Star Destroyer which seems to be under the control of Hux, who is at least on the same level of Kylo if not higher. Furthermore we have nothing to say that it is unique or customized.
The reason for his family issues are drastically different and the nature of them.
You also ignore the core reason for Jacen's fall with was a twisted sense of altruism.