Do Malaysians have a distinct appearance that sets them apart from Singaporeans?

I’m Singaporean (>18, F), but my parents are born in Malaysia.

I’ve had more than 2 people question me on my lineage (i.e. “Were your parents/grandparents from Malaysia?”) which confuses me because I don’t have an accent when I’m speaking Chinese (I corrected my accent ever since I was a child), and my English is perfect (No shade on other Malaysians, but at least you guys can speak fluent Malay and Chinese, which I can’t.)

Today I was walking around a mall when this guy stops me and asks in a Malaysian accent, “Are you Malaysian?” and I replied, “No. I’m Singaporean.”

There was also another occasion when my friend asked me the same question, so I asked them what would make them think I was Malaysian, and they replied “I guess Malaysian girls look different?”

Now I beg the question: What are the physical differences between a Singaporean and Malaysian person?