Are the two columns supposed to look similar? Because on Safari in OS X, the right one is very bold, and the left one is often way too spindly, especially on t

Are the two columns supposed to look similar? Because on Safari in OS X, the right one is very bold, and the left one is often way too spindly, especially on the last font. I wouldn't reliably call one column or the other better, but they are definitely very different.