Yeah,it's pretty cool.But,there's alot of things different.It's supposedly based on the mangas more than the anime.
Endymion is the "master" of Beryl's generals,and Zoycite is obsessed with writing a perfect piano piece for Sailor Moon so that he could win her love.
Ami-Chan is captured by Nephlite & turned into an evil senshi,Dark Mercury,who looks really awesome,but isn't quite as evil as she seems.It seems that even tho Nephlite turned her evil,she still has a soft spot for him in her heart.
Sad thing is that Nephlite neither has a relationship nor dies early on in the PGSM series.Now,if you're a big BSSM fan,you should instantly recognize Osaku Naru's actress,Kawabe Cheiko,as an early Sera Myu Mercury,but this time,she gets to be Usagi's friend instead.
There's also the aspect of Mamo-Chan being engaged to a woman other than Usagi,which is introduced like 1/2-way through the series,but no worry,as Hina is not a permanent fixture in Mamoru's life,as Usagi is.
Also,there's a special that tells Sailor V's story & has some excellent cosplay from the girl that later become the Inner Senshi.And,it contains a Hina story & a Mamoru story as well.
Also,there are 4 specials total for *PGSM* & some of those will be hard to find,unless you use {shudders} BT,which I hate.The specials are: 1)Super Dance Lesson 2)Kirari~Sailor Live 3)Special Act 4)Act Zero
For all the PGSM music you could want,be sure to check out
http://shineaquaillusion.org !!Also,for weekly BSSM/PGSM/Sera Myu d/l's,be sure to stop by
http://junketsu.com 's *Media* section.....It changes every Friday.
Hope I was of help to you.