Did you convert to or assign the profiles? If just assign then they should just appear differently on the display but the actual image bits stayed the same if not applying colormanagment in print tool.
It is when you assign and then convert or directly convert where you will see a difference. I am writing up something for my digital negative workshops about different inverting methods using assign/convert to different color spaces for getting more/less contrast with the same QTR curves. It really depends on the kind of images you’re working with, but it can make some things pop just a touch more than straight GG22 with no CMS.
Richard Boutwell
My profiles are all embedded, not just assigned. I made some test prints today and, effectively, no matter what profile used, as long as color management is turned off, there is no impact. With color management turned on, the differences of the gray scale profiles (Gray Lab, Gray Gamma 2.2 or even untagged) are very minor. In any case, I believe it is best to stick to a fixed setting and correct with a QTR grey curve and linearization.