I have 1 blue+ 1 red dwarf gourami in my tank they are very quiet natured I also have mollies, zebra and neons in my mix of fish My dwarf gourami's never bother any of my other fish
Where as my large Gold gourami is forever getting fits where he decides chasing everything that moves by him is fun In particular my gold gourami picked on my dwarf blue gourami but never injured him.
At first my dwarf blue started loosing colour because of stress, but now is clever enough to use his size+agility to loose the gold gourami mid chase

If you do get dwarf gourami you might want stay away from "norm" size gourami in future purchases Some research says its in their nature to bully the dwarf gourami's
On the other hand I have two "norm" size 3Spot gourami's and they have never bothered any other fish in my tank...
So I'd say deffo go for the dwarf gourami
The dwarf blue is in my experience more shy than the dwarf red
Best of luck! Let us know what you decide, perhaps you'll end up getting both... Then if they do chase, they'll prob only chase each other