It doesn't help that there is no clear goal when component rolling.
Do you have access to an equaliser? I'd be using that as the fallback and learning tool.
Well here's my ultimate-speaker-comparison-when-difference-shouldn't-be-audible:
Make sure listening environment is symmetrical i.e. does not favor one side. L and R speakers XO'ed differently. Play the same musical segment twice in succession, "instantly" swap L/R input to the (pre)amp, not speakerwire. If one half of the soundstage presentation is preferred both times, that side (speaker XO) wins.
I did this to choose between series and parallel 1st-order XO for HeilEve my first speaker diy haha.
Make sure listening environment is symmetrical i.e. does not favor one side. L and R speakers XO'ed differently. Play the same musical segment twice in succession, "instantly" swap L/R input to the (pre)amp, not speakerwire. If one half of the soundstage presentation is preferred both times, that side (speaker XO) wins.
I did this to choose between series and parallel 1st-order XO for HeilEve my first speaker diy haha.