F25, and the small one F35. The F35 is considerably smaller. It's like the mom and baby.
F45 buffer brush, I don't have the MAC one to compare, I don't know why anyone would buy both the MAC and Sigma ones.. MAC one is a fortune, I have my POSH one to compare to. I think the Sigma one is much firmer, the POSH one is a big ogre of a brush, sheds like a monster and stinks after many, many washes (I never use this one). The Sigma one bled upon first washing, shed like a monster too, but the quality seems sharper.
And that's my haul for now. Hope you liked it!