I'm not sure of the difference exactly, but they are ever so slightly heavier, maybe due to a shallower "dish" at the rear, but its hard to tell when side by side. I think @arzrover (Bobby C) may have a much better idea as a part of the Daystate A.R.T. research team... I do know they like speeds from 950 to 1000 FPS , which is all I've tried out of both my Bleu Wolf and EDgun R3 Long. They could like faster or slower, but they group as well as the JSB .217 KOs in the Bleu Wolf, which is inside MOA for five out of six 5 shot groups...
As far as what @jwilson asks above, I think competitive airgunning is moving towards slugs, but it'll be quite a while until we see slugs as the major projectile in 100 yard competitions like EBR, RMAC, and PAC. It could be that a Slug Class is developed, but initially the big prizes big money will still be pellets. Right now and for the next couple of years, airguns are still made in the majority to shoot pellets, and if you want to shoot slugs it takes some time and effort to get them shooting accurately and consistently.
But, slugs can be just as accurate short range as pellets, and more accurate the further out past about 75 to 80 yards that you go. I've shot slugs at the Extreme Field Target in Phoenix twice, and although I didn't tear it up because I'm still learning steadiness bucket and sticks, and working on my off hand skills, it wasn't due to the gun or slugs. In fact, whereas others shooting pellets were having to hold outside the edge of the targets to hit the targets due to wind, I never had to hold past the edge due to the slugs greater BC. And that was with a slug that only had a BC of 0.084 (,217 JSB KO).
Look at NRL-22 allowing slugs in .22 and .25, that's a start. EBR will have an NRL-22 type event that allows slugs. I'm not sure what RMAC is doing, but the Utah Boys have been big on slugs probably longer than any large group of airgunners. It wouldn't surprise me to see slugs allowed in the Precision Marksman event at RMAC in 2021 (Covid allowing). My goal with my .25 Impact X was to make "an air powered .22 Long Rifle". I haven't tested it out much past 100 yards yet, but can consistently get MOA or better at 100 yards, and shoot 43.5 NSA slugs at 900 FPS. I could go faster, but why? The gun isn't strained and easily shoots those heavy slugs accurately, with a BC of 0.105. It was built specifically for long range ground squirrel schwackin' and NRL-22 matches.
In a nutshell, slugs are the future, thanks to guys like Nick Nielsen of Nielsen Specailty Ammo making them affordable and offering many sizes and shapes, and making them available to the masses... My guess is that in five years slugs will be the "normal" projectile for competition air gun events... They already are for long range hunting.
