Whereas and where: Can they be used interchangeably?

[Iloveenglish]

When do we use them in context of 'whereas'? Can they be used interchangeably?

Technically, a tank top has wider bands of fabric that go over the shoulder, where a strap top has just that, thin straps only.

Would it still be correct if i said 'whereas' instead of 'where' in this sentence? If not, what is the difference?

[Morteza]

Hi,
"Whereas" and "While" are used to show a normal contrast between 2 sentences:
I live in Iran,whereas my brother lives in Canada.
Therefore,it's not a proper alternative for "Where".
Regards,
Morteza