Test-P compared to D-bol do end a cycle.

[Jorlen]

Using D-bol to jump start androgen levels in the beginning of a cycle is popular. Test-P is popular for the same reason.
Test-P is also used when going off long esters to be able to drop androgen levels more abruptly when its time for PCT making the cycle more efficient.
I dont see D-bols used for this though.
What are the differences coming off a cycle on D-bol compared to Test-P?