Got a failed WP horse because the trainer fried her brain. Threw herself over backwards if you mounted. I knew her owner and met her at 6 mos old. She slept on her back like a dog, I thought it was cute. It was probably ulcers, she was always anxious. Her owner gave her to me at 2 yo after the trainer gave up. She became my eventer and dressage beast. Kept her 20 years 'til her death, I just always loved her.
Bought an OTTB that ticked all the boxes. He certainly likes me, but I was replacing my lost heart horse at the time. I never felt the real connection with this one. He’s a sweet, goofy, tries to please doofus. (He’s the one that follows the path that arcs further away from me when coming in, just neighs and trots faster when I call him to 'just turn left already!") I try to meet him where he’s at, appreciate him as he is.
My current heart throb is the maybe 2 inches too short for me pony. I’m on a diet so he can be my dressage pony. I loff him.
My advice, go with your heart, if all else is equal with these two horses.
Good luck and enjoy yourself!