Yeah, 60g dextrose would be a lot for some people. I probably wouldn’t do more than half that myself, knowing how I respond. But I have had some success layering a little on top when I wanted more carbs, like maybe 20g.Most of the research on this stuff is in endurance athletes, but generally 60g per hour is recommended for glucose/dextrose due to absorption issues. Using multiple sources tends to allow for greater absorption if one wants to go above that though (although most of that research isn't really with all the "fancy" stuff sold from what I have seen). So it would make sense it could sit heavy if you only used one source.
The other thing I was thinking about, with regards to “feel”, was water in the gut being a big variable that the tab form will not add to. The tabs are dry, while the dextrose powder will inevitably be mixed with fluid.
Something I’ve heard Nathan Payton try to impress more than once, in person and in interviews, is that you definitely don’t want a belly too full of fluid, bloated and sloshing. So he is a big fan of solid fast digesting things like the Rice Krispies, or dextrose candy like Nerds Rope, or some oranges & honey when fructose is desired. With rice or real food earlier on prior to training if possible.