Both rod's and Larry's are good. I've heard that rods can be a little rich but no experience. Personally I use Larry's and haven't had a reason to switch.
Both foods are fed the same way, thaw, mix and dump. The is versus a cube of mysid which is thaw, rinse out the nasties and then feed. You don't need to rinse Larry's which is good cause it leaves all the smaller particulate.