I'm not sure but to me, it seems that the purpose of both products are different. A conditioner is designed - generally speaking - to moisturise and detangle your hair. A cream can be moisturising, but belongs to the category of styling products.

However, I must admit that I don't have any sources for this other than my own experiences.
F - LP - HD - NE
Fine, low porosity, high density, normal elasticity
Hairtype 2c

Low poo: Petal Fresh Organics Rosemary & Mint Volumizing Shampoo
Protein: Colorful Neutral Protein Filler
Detangler/RO: KCKT (winter) or Curl Junkie Beauticurls Argan & Olive Oil (summer)
Styling: KCCC

Beauty Is Not a Number