It has no importance. It is better you use any exchange of your choice to pin or start the coins that you like paired with USDT. You can compare them individually.

What you do is to view more than 1 chart, like up to 4 on some exchanges which you can use to be viewing the price of 2 or more coins at a time. As for my preference, I prefer one chart. And this is used by traders instead of investors.

Viewing chart is easier for holders. Do not make things complicated for yourself.