In the realm of 'a moving picture is worth 1000 words' Here's a 10 second scene I was able to build and animate - extremely quickly - all in Carrara, and even though this was just a test animation for dynamic cloth in Carrara, I think it kind of illustrates my above point:

https://www.youtube.com/watch?v=uIAp6vysYZE&feature=youtu.be

First off, I'm using V4, with morphs, and a conforming top (from V4 basicwear).  Carrara can use all this natively and with no trouble (as well as Genesis and Genesis2, and other poser and daz figures).  There are other softwares that can do this, Poser and Studio and in some senses Vue, and maybe C4D with interposer pro.  Carrara is not unique in this sense, but the list is actually pretty small, and some will scoff at using premade content, I'll just scoff right back at those who don't believe in saving valuable time using high-quality premade content when it can be used.  :)

Next, it's animated, because Carrara has a very robust set of animation features.  As I've learned watching SciFiFunk's tutorials, Carrara's NLA functions alone, and the fact you can have more than 10 NLA tracks you can mix and match, are extremely valuable in animating.  I'm no animator, but I'm learning, and NLA is just one of the many many animation tools Carrara has built in.  Here I've gone in the 1st 3 seconds from a T pose to a static standing pose, and then started an aniblock for V4 that I imported in.  I forgot to put in a Mimic Pro track for blinking and breathing and lip synching such, but I could have done that too and mixed it in no problems.  Carrara can import and use BVH, Aniblocks, Mimic Pro, Poser animations, etc.  Again the list of applications that can do this is limited.

Next, the dynamic cloth.  I modeled this in the vertex room starting with a simple vertex cylinder, tesellating it, cutting out the top and bottom to make it a tube.  Could I have modelled this in another modeling software?  Sure, but why, when I can do it all in Carrara without ever leaving the application.

And then I went into the assembly room and modeled there, on top of the V4 character I was attaching the cloth to.  Hmmm, not sure anywhere other than Carrara could I have done that...

I ran the cloth simulation, it's super fast and runs nearly in real time.  There are other dynamic cloth solutions, but again, I'd have to have exported, imported, tried to match it up, etc.  I can't speak to Marvelous Designer because I've never used it, but Carrara's cloth sim runs in real time, and much faster than for example Poser's cloth sim.

I then modelled the hair in Carrara's hair room.  Took me all of 3 minutes to put the hair together, then the hair sim was incredibly fast too, again nearly real-time.  Also there is nothing in the hobbyist world that even comes close to the realism of Carrara dynamic hair.  It's fully on part with pro level software.

Hit render button, done.

Yes, this is low quality in render settings, simply because it was a test and didn't matter and that I wanted a quick animation render (and it was very quick to render, and now I can change/correct/refine my cloth settings next time to zero in on exactly the look I want).  But the point is, all of this was done - very quickly and easily - with Carrara, and I no other software that I know of can do all of this together in one app (and this doesn't even scratch the surface of what Carrara can do, all by it's lonesome).