This grip is also widely used amongst high-level judokas. This grip consists of gripping the lapel of the opponent with one hand, and gripping the sleeve with the other hand.
I often tell my students to use whatever grip is available in the match, if you see your opponent offering the two-sleeve grip, take it and don’t hesitate, the two-sleeve grip will give you more power and more control over your opponent as their limbs will be tied up.
If your opponent uses the standard grip (sleeve & lapel) take it too, it’ll do the job fine. I have seen judokas executing successful Sode tsurikomi goshi throws using ONLY ONE ARM while their other arm remains free and doesn’t grip anything.