I haven't tried Paul Mitchell. But they have a spray-in conditioner that I eye everytime I go to Petco. It smells like almonds
I have a Morkie who tangles easily, especially around her legs. Her hair texture isn't cotton, but it isn't silky either. It's almost coarse. I've been using #1 All Systems Super Rich Protein Lotion Conditioner on her & it's been working really well.
Amazon.com: #1 All Systems Super-Rich Protein... It's not a miracle, but it definitely helps with keeping her coat moisturized & she's less prone to tangles now. I also brush her legs a few times during the day so I can catch any tangles quickly, before they mat. I also like the IOD Silky Coating Brush Spray...
Amazon.com: Everyday Isle of Dogs Silky Coating...
I used Pet Silk shampoo & conditioner for the first time on her yesterday. That stuff seems to be working pretty well too. The Silk Sheen works well on my silky coated Yorkies because it makes the coat a little slippery so that tangles don't have a chance to form.
Pet Silk - Pet Grooming Products, Shampoos, Conditioners, Colognes
Do you have a Madan brush? If not, that's a MUST. They're excellent for brushing & glide through tangles. Mimimomo sells them in her shop. You want the small, medium/firm cushion.
toplinepet.com
I'm a total product junkie.

I hope that helps a little.