There appear to still be two sets of KO PotP Dinobots in the wild.
The first is a 1:1 KO by BPF, the one referenced by OP, which pairs Grimlock with his giant FOC sword. The BPF set is perfectly fine, and except for minor cosmetic differences, almost identical in quality to the originals.
The other set is by Black Mamba/BMB, fine purveyors of slightly upscaled knockoffs with added die-cast. They come in two flavors: original colors, and multicolored.
(The multicolored Dinos are apparently based on the Power Rangers Dino Thunder toys. Since these are largely for Chinese children, I'm assuming Dino Thunder must have been quite popular in China for them to select that color scheme over say, the original MMPR colors, or the G2 colors).
The Black Mamba set is fantastic. All of the dinos have been upscaled, which means Sludge, Slag, Snarl, and Swoop are now Voyager sized, and the same height as PotP Grimlock in robot mode. The diecast adds a little heft and stability - unnecessary, but not to the detriment of the figures. Each bot comes with a translucent red sword and a blaster, plus the Prime armor pieces necessary for Volcanicus.
Sludge, Snarl, and Swoop are greatly improved at this scale. Transformations are intuitive, both modes are solid, and only minimally compromised by the combining gimmick.
Grimlock, as has been well documented, is far from screen or toy accurate, and is perhaps the most compromised by having to form the core of Volcanicus. Despite that, he is quality. Leader-sized, thicker plastic, solid ratchets. Heftier and more solid than SS86. If Hasbro's offerings were at the same level as this Grimlock, we'd never hear about the Great Cheapening again.
Slag is by far the weakest of the Dinos. The original design was neither particularly toy nor screen accurate, and his shortcomings are even more evident at this scale.
In the final analysis, the 1:1 BPF Dinos are great for anyone who missed out on the originals, while the OS BMB Dinos are great for assembling a complete set of Voyager-scaled Dinos to match with the original Grimlock. The extra Leader Grimlock is a fun alternative to SS86, for those who can't find him.
I'm collecting SS86 almost out of a sense of obligation, but I have to admit that they haven't sparked the same level of joy that these upscaled PoTP Dinos have.
As for the Skittles-flavored Dinos, one word: "NEON"
TRDQ showcases them pretty well here:
https://www.youtube.com/watch?v=sXMx7UPaxVE