The Warriors and Panthers share a lot of things, not least of all the fact they are mentored by individuals who not so long ago sat in the opposition coach's box.
Warriors' coach Matt Elliott returns to the club that sent him packing midway through 2011 and Ivan Cleary will take on the side he led to the grand final in the same year.
Add to that the fact Lewis Brown and Isaac John were Warriors' players not so long ago, and Elijah Taylor will head there next season, and there are a number of interesting subplots.
Both sides are desperate to make some progress after wobbly starts to the season and the Warriors are battling confidence issues that have seen them give away handy leads in their last six games.
Penrith's confidence will have returned after picking up the prized scalp of Melbourne last weekend when they beat the defending champions 12-0. Not long ago, they were a popular choice for the wooden spoon candidates but they are now only two points outside the top eight.