Sertorius is the third product I've had the pleasure of reviewing from Bedrock Games. I really like this RPG. This game includes a complete fantasy setting and the premise of the player character's taking the role as near demi-gods. The GM sections of this book are well done. The Review on EN World is here.
Simple Superheroes is a sandbox type RPG enabling player characters to create their own super powers and abilities. I enjoyed this RPG, but gave it a mixed review and I wasn't a huge fan of the overall layout of the book. There are certainly simpler games out, and due to layout I'd recommend the PDF over the dead tree version. I liked the GM section of this book as well. You can get a pretty good idea by checking out a succinct PDF outline of The Heart of Simple Superheroes -free of charge, here (no affiliation).