What are differences between the two? Are there any differences? Or are they just different names for the same thing?

pretty similar..Submission wrestling is always done without a GI and usually does not have belts/ranks.

One's Brazilian?

They are different, although BJJ has had a significant impact on submission grappling. If you look at the early pancrase and shooto tournaments, there was pretty much no guard skills. When BJJ started to take off due to people like Rickson and Royce Gracie, the need for guard skills became obvious and was integrated into submission grappling (at least the Japanese version).

 

There are a few different types of submission grappling though. Some BJJ people who do all no-gi work call it submission grappling. The catch-as-catch-can guys call their art submission grappling and the Japanese submisssion grappling guys (who were also heavily influenced by Catch) call their art submission grappling.

Submission wrestling is basically a generic term for, big surprise, wrestling for submisson

 

BJJ generally wears the kimono (not always) and often includes desfences against strikes, basic self-defence, striking, etc (again not always) But it has a lineage back to Brazil and the Gracie family.

 

Both have a few different sport formats, which differ from each other. BJJ seems to reward position more.

 

BJJ tends to give a slower, tighter match as in its sport format a Kimono is worn which provides many habdles to prevent escapes and positional advances. Where Sub wrestiling doesn't wear one and it is harder to keep someone still making it a little looser and more explosive.

 

But you can do submission wrestling and still be doing BJJ.

 

Most of the techniques and training methods are the basically the same (except for ones that rely on the gi)