GMAT Write 1 vs 2

Hi guys,

Anyone know the difference between GMAT Write 1 and 2? I checked the official GMAT Write thread but it seems to be quite outdated! Would love to have some feedback if anyone would like to share

Also, is it worth the 30$? I would say that I am pretty good at writing, however, I would like the confidence boost - that is the main reason i would consider it.

Let me know!
Thanks!