The grass is greenest where you water it.
Mechanically, a more rigid, heavier rest, with more contact to the rifle and more contact to the underlaying surface will provide better support. If a shooter can’t capitalize upon the weight, contact, and rigidity of a machine rest and bunny ear bag over the lesser support of a bipod and squeeze bag, it’s NOT a fault of the equipment, but rather unfamiliarity of the shooter with the gear, and resultant misuse. Plainly, there’s a bit more to it than simply setting a forend on a machine rest.
If a shooter practices more with one than the other, they’ll shoot better with the more practiced option.