Which Jillian Michaels 30 day us better?

Depends on what your looking for. A better challenge or something you can work through a little more easily? 30 day Ripped is more advanced than 30 Shred IMO. I can do any two levels of Shred back to back in one workout session. Not so with Ripped. I have yet to get past level 3 and I've only managed level 3 once so far.

Unless you are reasonably fit and strong already, I would reccomend starting with 30DS. You dont neccessarily need to stick with it for 30 days - I just do each level until I can keep up with Natalie (doing the harder versions of exercises), then move on.
Once you've mastered that, move onto Ripped in 30.
Ripped in 30 is much more fast paced and intense.

You can find 30 Day Shred on YouTube. I reccomend giving it a try and seeing how it feels.

I have both and have completed both and I prefer Ripped in 30. Level 1 of 30 day shred was too easy IMO. In Ripped in 30, she hammers specific muscle groups back to back making it more challenging.

I'm curious about this having done 30DS already (also back to back)... I would say I am ready to move on

Can anyone post the length of Ripped in 30 compared to 30DS? Also whether 30DS or Ripped in 30 was better for them in terms of results? I'm wowed by the results I got with 30DS..

I just started RI30 last week. 30DS is 28 minutes warm up to cool down. RI30 is 33 minutes. Difference is longer warm ups and cool downs. Main work out is the same, 3 circuits of 3,2,1.