I think they are just little bit to small for me.Maybe he doesn't want to spend $5 for six when he could get the same thing for less. It might not sound like much, but it adds up if you eat through picks.
I bought a pack of PG picks to try them out. They were very good, but a bit too shallow for me.
Actually, as a former Big Stubby user I can unequivocally state that they're not very similar because they sound a lot different.I know whats perfect for you! Dunlop Big stubby 1.0 mm. Thats what I use! Very similar!