May the better man win. Warren is a superb player and an even better grinder.
That said, you've got to love Filler, who has always understood the value of matching up with top players in many different disciplines. A year ago at Derby City, he gambled with and broke even at bank pool with recognized star of the discipline Shannon Murphy, and later in the week he was the only player that stepped up to the plate to play high-stakes ten ball with JL Chang, and beat him.
Cornerman put it very elegantly in some of his comments after the 2020 Derby City Classic, and I can see where he's coming from. Josh not only seems to be committed to developing his game in all disciplines, but he also seems to enjoy all the fringe games.
A few years down the road, Josh may just contend for Master of the Table at Derby City. To my knowledge, no European player has ever accomplished the feat.