I prefer a low deck if you want to push the motor past about 630HP on a stock block.

a little less weight when you sum it all up and the bob is usually about 150-200g's lighter. smaller mains coupled with 2.200 rod bearings cut down the reciprocarting mass and total bearing area roughly that of one full rod bearing.

What is a little bit of a drawback to the low deck (I'm surprised noone mentioned any negatives) is that when you run a roller with a Max wedge head/offset intake rocker the (even) shorter pushrod is at a comparatively extreme angle vs that of an rb...that extra 3/4" knocks a few degrees off the angularity and helps with port wall clearance as well.

The individual advantages are small but when you sum them up all else being equal the low deck is worth about 25-30hp for the same cubes. By my estimation and experience a 470 low deck performs in every respect comparable to a 493 RB.