Regarding CMC MAG E01, no these wont burn the same with stock and modified strategies.
Wherever possible the 4X - 8X strategies are kept as stock strategies and a couple of high speed strategies are then used to achieve the speedup.
This is not always possible, as in the case of E01. Where a stock strategy canâ€™t be used (no room in the firmware) then a well tested generic strategy group will be used for the slower parts of the burn. Sometimes this will improve the burn quality at the mediaâ€™s rated speed, sometimes it can have the opposite effect.
I always put in a lot of effort to try and ensure the disc can be burned well at itâ€™s rated speed.