Solid Rollers on a Hydraulic Grind Cam

I am still not sure why that xr274hr cam is so much more aggressive than the Xe275hl. I get that a roller can be more aggressive ramps, but not sure what make it troublesome. Especially since comp makes a xr280, xr286 and xr292! I am really trying to find a 224-226/230-232 roller for my build. One that should give trouble free break in.