Great question and I don't think there is much difference. Both are wider stripes and the only difference I can see is that the beaded shows a definitive break in the line. A pindot requires you to look closely. I saw some "pin dot" and it has an unbroken linear look to the stripe. Maybe a weaving distinction with the two piece goods, but rarely see outside of STP offerings from HF (c'mon, that's where you saw it)
Not a fan of beaded as it creates a fuzzy stripe.
Actually, it was because Despos suggested a bear stripe suit and I had no idea what it was. They both sound similar.