Is this better than a diffuser? Does it make a difference in how well your curls set compared with a diffuser?

I can't buy a hard hood dryer because I don't have the space for it or a proper place to set it up in terms of height.

I'm cross posting this in the general section. Thanks for any responses!
2/c-3a Coarse hair med. density.
Protein sensitive but can use occasionally
Highly porous. Color over grey.
Best 1st day method: Ice Queen!
Stylers: Mix Curls in a Bottle into everything for shine. Terrible pj
Sometimes try roller sets or use a curling brush - classic glamor.
Every day is a gift