I hope this post is why you have the dubs. Seriously.
How is Ju Jutsu, the art which Judo (and Sambo and BJJ) grew out of, a mixture of Judo, Karate, and wing chun, a Kung Fu (read: Chinese) style with questionable origins?
Jujutsu/Ju Jutsu/Japanese Jiu-Jitsu is the catch all name for the various martial arts of the samurai ryus of pre-1900's Japan. It fell out of vogue when their society changed, and it came to be associated with street thugs and prize fighters until Kano picked it up and repackaged a couple styles as Judo to make it public-friendly. Kodokan Ryu Jujitsu (what it was called for a while, or Kano Ryu) got it's ass whupped by Fusen Ryu, so pulled away all their best students and absorbed the school. Judo was born, reigned supreme until after the war, at which time sanctions placed on the Japanese government concerning disarmament and a ban on martial training (they weren't allowed to have an army) necesitated Judo's transformation into a sport. The sport was most easily won by throwing, so schools focused on that the way any sport school will focus on the best way to win at their sport.
Maeda, a KRJ BB (and as a result, Judo BB) went to Brazil and trained Gastao Gracie's kids, and that's where BJJ came from. It was developed for fighting, and stayed that way for a long time, but now is being turned more and more into a sport style, and getting away from the minimal striking they trained, unless you find an MMA-focused school.
All that said, BJJ, Sambo, Wrestling, and Judo are the big names in wrestling, so they ARE all the ultimate grappling arts. I can't even name any others that aren't off shoots of those that aren't as distinct.
On average, in the US, Judo and Sambo schools train a couple nights a week, and spend 80% of the time on their feet. BJJ guys train four or more nights a week, and spend 90% of the time on the ground. In a given year, that breaks up to the BJJ guys spending roughly the same ammount of time standing the Judo guys do on the ground (since they train twice as often), and over twice the ammount of time on the ground Judo guys spend standing. Given that current model, a Judo guy will NEVER match a BJJ guy of equivalent rank on the mat, and it's easier for a BJJ guy to develop a takedown game to get it there (I've competed in both, and I've seen plenty of guys that have only done some wrestling come in and sweep Judo divisions with nothing but a double leg and a pin to their arsenal. I've also heard of, but haven't seen, guys winning on points in BJJ with the same game plan, but your average white belt that competes in BJJ will have more answers to that gameplan than the first three or so ranks in Judo. If a BJJer trains his shot for his 10% of his training time...).
All things being equal, training time et al, a Judo BB takes 3-6 years at 2 classes a week to get. A BJJ purple belt takes 6-8 years of four nights a week. The deck is stacked.
I've been doing Judo since 2001 at a school that also had BJJ, had a long break for an injury, and then did another year of Judo before getting ot my current BJJ school. I'm a blue in BJJ, with a great top game and some throws that get a lot of compliments, but aren't all that special. I'm like a white belt off my back, so luckily I have some good sweeps. My original Judo/BJJ school spent about 50% or more of the time on ne waza, because we didn't have time for randori, so would just do the throws as drills with rare one-on-one.
After a year + off rehabbing my knee, I took a Judo my division in a judo tournament and stifled a black belt in the open division, all with ground work (and defending the throws). I wound up losing off an ouchi gari because I was standing too straight after stupidly letting the black belt up (I literally stood up and called him to his feet when I was up on points, because he was doing a good job of turtling, and I didn't want to waste energy. The ref told me he was gonna let me run the clock, since I was staying so active.).
I ran that tourney on what I remembered on the mat. I got a Kimura, a Jujigatame, and a Wakigatame, and rolled the black belt with an Anaconda, but didn't feel like I was gonna finish it.
Yet all it took was a basic inside reap to end my tear.
Judo's stand up grappling is superb.
BJJ's ground grappling is superior.
Sambo has grip work and positioning innovations that could bring up anyone's game in either.
Studying all three would make you the ultimate grappler.
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