Now let me give you an actual work session example.
I have a lot of game textures, and yesterday I just ran auto 4x. gigapixel saves the model chosen into the file name, so it was easy to figure out that auto was enhance about a third of them with art or low-rez model the rest was standard. Photo does not do that there is no way to recover that info that I am aware of short of hovering over thumbnail before saving, which is painful.
So I quickly made a short list of why they was not standard, previewed a few then realized these are was supposed to be organic photo realistc textures but they got created as low-rez hand painted art (because its a fantasy game). Then a few more that was not art but it still classified them as such, after some preview I realized they had geometric features being mistaken as art. So I decided to just restart and set all them to 4x standard model with auto param (again not possible in photo - copy all copies all the parameters) Auto model was a waste of time it changes more that should be standard than need to be something else. lesson learned not going to use it unless beta changes, and even then I will spot check known problems.
Then I created different selection sets for just changing sizes and model.
dozen sky textures where 4x was too big, click each in that set, click 2x once
lot of vfx textures click each of those, click 2x once, click art once. I know they are art and need performance for those and any standard detail gets lost to alpha so I also raised the blur param with one click.
lot of water textures for animated and depth shader. click each of those click 2x once. Look at one and go yikes that realistic std look is going to clobber shader performance (its an old game), one click all those are now low-rez model.
Bunch of cartoon art textures for in-game books, select each of those, click art once, notice they are stupidly jpegs and small size, fiddle with the compression slider on one - find 50% works, click once to change the entire set. Also click gamma once.
This town over here has marble and tile floors, let me take a close look at those as I know hi-fi will dial back what std does and I fear the worst. Yep sample one and it is like grainy rock. Go back and forth decided if low-rez or hi-fi looked best, settled on low-rez as it looked more smooth. Click low-rez once for that entire set.
Think I am done, go to bed, and its done in the morning. Windows slideshow and take notes that there are a few dozen out of the thousand that I want to customize each one using the quad view to decide and turn off auto param and start playing with sliders. Some of them I say not sure leave it, until I can playtest the game.
It took more time to type this than do these multiple intersecting set selections in Giga, and it batch ran over night. Now I do have a minor grumble you shoud learn from excel/windows and make select multi-modal using direction keys, search, (shift/ctrl) click, and mouse groups - but the bolding, coloring and quick scan scrolling in full spreadsheet view really helps spot individual misclicks to perfect the selection.
With photo spent all last week trying to do this and never even got one selection set done right in photo, even just trying to click each and for each manually turn blur AI off . And changing hi-fi to lo-rez which I know does milder blur. With the film strip I kept missing the blur icon even slow scrolling, and would miss click and misclick and oops did blur off but forgot to change the model, no way to verify that without click hover. eventually computer crashed and I lost the entire session without saving. I gave up and was going to cancel this its simply not feasible, and auto mode was simply not acceptable results, then someone mentioned they also got the bundle with gigapixel when I thought it was just same point tools same UI.
I found it was far more useful for batching to select subsets with the spreadsheet view and clicking the param change once because with large datasets you know if this one has a problem, I got a hundred just like it - I do not need to look at it them all nor click the setting change for each and every one of them, nor do I want them to have all the same parameter set.