Recognize Between Thin Pulse Waveform & Saw Waveform

Hi everyone,

I've just joined the syntorial community and it's with great pleasure that I'm discovering this magnificent world of sound design.

I'm a beginner and I'm writing this message because I'm having a lot of trouble distinguishing between the saw waveform and the THIN pulse (and only the thin one) waveform. For me they sound the same... I've been stuck on the same quiz for two days without being able to recognize them perfectly. The exercise is still very complicated with low pass filters.

I wanted to know what your methods and tips are for recognising them