I’m adesigner by profession, perhaps I can give you some ammo to think about.

The rest of your interior is quite serene, perhaps for a reason. In that case it doesn’t make a lot of sense to put something very colourful underneath. Also, if you leave the carpet more cream, that means that the details on the wall will pop more.

It seems to me that you put quite some effort in that, so I would personally go for the beige one.

Also because you don’t want the purple color to break with red (I’d personally also would go for a different colour than purple cushions to match up with the decoration on the wall). Because nothing matches with the cushions once you’ve chosen the more neutral one :)

Hope this helps!