After playing this game for about 6-8 hours I can safely say that this ISN'T the same as the original CM3D2(After a bit of research I found out that it has the same features as Custom Order Maid 3D 2 so everything I saw here is only relevant if you'e played the original CM3D2.), I only played it for a couple hours when it first came out and about a year ago so maybe the experience is different but from what I've seen there are a lot of new things, mainly the facility system. You can upgrade your facilities now and build new ones which unlock new jobs and new scenes, before these were just appends but now they are integrated into the core gameplay. Also theres a story which I don't think was in the original. And maybe I just never got that far but I'm still get love events for my character 240 favor in.
But there is plenty of bad in this, the translation ranges from decent to machine, so hopefully it won't bother you too much(I have a lot of experience with it so while it's not ideal it's fine for me.) Some of the translations also are weird, Yotogi is basically sexual acts, I really feel like there would be a infinite number of better words for this. Default game is censored(not that matters to me that much) but when you uncensored it the genitalia looks extremely pixelated so you need to get a skin mod of some sort to fix that. There is no good replacement for the male body, it will always look off with a real body to it, some of them look better then others. And my biggest problem was the first 3 personalities you are forced to make, you have no way of previewing them normally without remaking a character and for the first 3 days you will be forced to make the next character you didn't make it, but the FIRST ONE YOU MAKE is a... Maidlord? I'm pretty sure that just means they're the head maid and you can't change that for quite some time.
Also a new feature I believe is the rhythm game they put in with the dancing thing. I remember scratching my head the first time I saw it but it's integrated into the story and has a minigame(that I'm terrible at) to go with it. I also believe you can skip most of the minigame if you train your maid to have good enough dancing/vocal skills so theres that too.
TLDR, It's not the same thing As CM3D2 but it's the same thing as Custom Order Maid 3D 2.They added a decent amount of new content to the game for the all ages version which you also get when you update to the adult version but saves aren't compatible between the two and you'll lose all progress if you stick with the all ages and decide to move to the adult later. Also adult Idolmaster.