To me one the main benefits of judo for a jiu jitsu competitor is as simple as providing confidence in basic movement on the feet, basic gripping, basic posture, etc. That’s how it helped me, but it’s especially cool to see the occasional judoka pull off a textbook throw at the higher level of competition. I’ve seen a few drop morote seoi nage’s and a lot of excellent foot sweeps, but I haven’t yet seen a tai otoshi pulled off quite as nice as it was done in the following clip of a brown belt match from the 2013 Pans:
Here’s Jimmy Pedro breaking down this exact technique. He describes a useful grip variation for a BJJ competitor, but the guy in the above clip didn’t need the variation. He did it the old school judo way.