u/Dildo-_baggins

I have these two beautiful gymnocalyciums, and the one with the white flowers opened up a few days before the yellow one. I hope that at least one of these will take.

Does anyone have any experience doing this? What can I expect the baby cacti to look like once I plant the seeds?

Edit: thanks to u/AndreiAZA, it looks like I'm dealing with a gymno and a notocactus. My dreams have been shattered, but I'm glad I know the exact variety I have