Clear lamps like MR16 halogen is 'harder' than a BR reflector lamp. The level of hardness depends on how well is diffused. I am not sure what unit is used to measure this and it is not part of lamp specs, so it is kind of trial and error. It wouldn't show up on a light meter reading, but it will show up on a photographic image. Optical pieces such as lens, diffusers, and textured reflectors consume some lumens as well as directionality which costs lumens per watt as well as target efficiency rating.
The strange, multi-edged shadows you may see at gas station is a characteristic of LED lighting system that do not use a frosted diffuser to avoid optical losses.
CRI, vertical and horizontal plane foot candles and conventional lighting design address this descriptively like I am, but I don't know what measurements are used.
The diffuser, and to smaller extent, the texture of reflective coating and the design of the solid state fluorescent lamp element plays a role.