Steffi Love and Vintage Tressi

I'm attempting to ID my childhood dolls.

The blonde is a Simba Toys Steffi Love doll. I think the riding outfit is her original outfit, but I'm unsure. It may be what she's wearing. She's well joined so she could be either a horse-rider or a gymnast. She has an odd diagonal waist so she twists at an angle.

Tressi was my mother's and has a button on her stomach. A braid of Tressi's hair can 'grow' or be retracted. I think the dress is handmade; she has a lot of handmade outfits.