For me by the color they are close to each other, so it's a hard task, however if I sing the chords the voicing of them and try to sing a major or minor triad after that I am more likely to understand what this chord is.

also, sus chords are used as a tension building chords, maybe this you can use to your advantage - where this chord wants to go to?
For example: I-Isus2 wants to go V(1st inversion)
I -Isus4 wants to go IV (2nd inversion)
Reverse direction is also possible.

Something that helped me differentiate sus 2 and sus 4 chords is relating them to songs, that way your memory is triggered whenever those chord are played. I associated the sus 2 chord with 'Under Ice' by Kate Bush because it uses that chord a lot. I associated the sus 4 chord with a piece I composed but it is also found in a wide variety of songs (e.g. 'I Want to Tell You' by The Beatles).

This is basically an inversion exercise, you cannot listen to color as easily. I listen to which of the notes are clustered, eg that sus two has a interval of a M2 on the bottom and sus 4 has it on top.

IDk I just listen for the tone, sus4 has more of a final feel to it, but sus2 has a bit more suspense

in the intro of Cold as Ice Have amizing opening rif the play sus4 that resolve to minor
and Crowded House - Don't Dream It's Over the first chords is Sus2 also the first chord in the verse ,
if you hold in your mind some clear represents on the sound will be much more easy

Thanks for all the advice, guys! 😁

I am trying to hear, where the friction of the major second interval is, or the other way around, where the clean tone is. Clean at the bottom and friction on the top is sus4, clean at the top and friction at the bottom is sus2.. For me this works well.

(According to my piano teacher it is better to learn to break down the chords by singing the single notes and identify them, but i am far away from that. Because I am not able to do this I got stuck at inversions of dominant seventh at inversionist, so I am trying to learn this now).

Hehe! I just got to level 41 and am feeling the suspended pain now... taking in all this good advice!

Just wait till maj6/min6...

@Benjamin Jack It took me a long time to get past that stage. And then they throw 6/7, 6/9, 7/9 at you. I'll probably be stuck there for another several months. :) Chordelius is my worst game, percentile-wise, not counting Melody Jay, which I abandoned early on (its pitch detection seemed much more sensitive to me than the other singing games, which I do just fine).

What really works for me is to start singing all chords up from the root/lowest note. This has helped me hear into chords rather than just hearing a blob of sound. I just encountered the Sus2 chords for the first time today and was able to easily pass that level by first singing the root, and then the other two notes. Good Luck. You can do it!

BTW, I don't think this is a crutch, since singing is the best way to also get better at audiation. Eventually, the goal is to be able to audiate in my own head the individual notes in a chord.