Red lucky block is a new order of lucky blocks. There is more drops than lucky blocks.
It´s drop Edit
Basic, super lucky or mineshaft dungeon chest.
Some chain armor.
Spawn very, very big slime.
8 hay bale.
5 pigs standing on themselves and on the top is a villager.
Some piece of lucky tools (enchanted diamond tools in version 1.6. and 1.11.2) but in version 1.7.1. is enchanted gold tools.