my friend argues with me that sports jiujitsu is more of a challenge than judo because sports jiujitsu focuses on more ranges but i belive its tougher in judo because an ippon can mean an instant win plus you can improve better in judo because your only focus on throws and ground any thoughts on it

The question is kinda nonsensical. Whether one is doing judo or jiu jitsu your opponent is also fighting with the same rule set. This means that neither is more or less challenging than the other and which one is or isn't is a subjective question and answer.

I'm not sure if it makes sense to you or not, but it's kinda like asking if it's harder to compete in a bench press competition vs a deadlift competition.

well what my friend told me sports jiujitsu has punches and kicks and you can only grapple on the ground for 30 secs i think that limits what you can do on the ground but he says it like the street you dont want to be on the ground

It is a little like asking whether Roman-Greco or Freestyle wrestling is tougher; getting thrown or lifted and slammed hurts, but the art of pinning is very physically demanding.

From a technical point of view; I would argue Judo, in that there are many restrictions placed on how you throw, and what constitutes a successful throw. So the level of throwing, I would argue, is superior but also harder to learn to do well.

However, on the ground I must argue Jujutsu because of the greater variety of techniques allowed, but also the lack of restriction on how long the fight can last on the ground.

I would say that Judo has perhaps more explosive intensity, but that Jujutsu is more trying the longer the bout lasts. However, I have only ever competed at white belt level in both a couple of times, so I cannot say much more.

Now Vale Tudo compared to Judo is far more intense; which I what I suspect you may actually be getting at.