Choose judo if you want throws, upright grip fighting, and a ruleset that can end a match from a clean throw or pin. Choose BJJ if you want more time working through guard, positional control, escapes, and a wider submission game on the ground. Both are grappling arts, but their rules train different priorities.
The biggest difference is what ends the exchange
The current IJF rules library gives judo decisive standing scores and timed pins, with ground work continuing only while the action is progressing. The IBJJF rules reward takedowns too, then score guard passes and dominant positions while allowing submissions to end the match.
That doesn't make one art complete and the other incomplete. It explains why judo practice spends more attention on entering, off-balancing, and throwing, while BJJ practice can spend longer untangling a ground position.
Judo gives more weight to the standing exchange
Judo develops posture, movement, grip fighting, foot sweeps, trips, and throws against an opponent wearing a jacket. Learning to land and to control a throw is part of that standing emphasis. Exact techniques and legal grips depend on the current competition rules and the class.
BJJ includes takedowns, but a BJJ academy can divide its training time differently because a match can continue through a long ground exchange. If takedowns are your main reason to train, ask how often the class starts from standing rather than assuming the art's name answers the question.
BJJ gives the ground exchange more continuity
BJJ gives both athletes more room to keep working after the takedown. The top athlete can pass guard and improve position. The bottom athlete can recover guard, sweep, escape, or submit. That longer continuity creates a deeper game around positions that judo may stop and reset when progress stalls.
Judo still includes ground control, chokes, and armlocks within its rules. Saying it has no ground game is false. The difference is how much time and scoring emphasis the rules give that phase.
Which one fits your goal?
Pick judo when throws and jacket-based standing grappling are the main attraction. Pick BJJ when guard, escapes, positional control, and submissions are the reason you want to train. If you already practice one, the other can expose a part of grappling your current rules let you avoid.
Coaching, training partners, schedule, and the class you will attend consistently matter more than a universal winner. Try the real room before making a long-term choice.
What Black Cat teaches
Black Cat teaches Brazilian jiu jitsu and wrestling. It does not teach judo. The adult program owns the BJJ route, and the wrestling program adds dedicated takedown and top-control work.
To compare the actual Black Cat classes, read those program pages and send a trial request. Staff will call to confirm the right class and first-visit details.