This hard shell contributes only a little to the overall strength of the rim. Base your choice on reputation or color preference. At one time virtually every tubular rim positioned the head of the spoke nipple against the inside wall. When a washer is put between the nipple head and the rim, this design works quite well. The 1970s saw the introduction of a new design with thimble-shaped ferrules that tied together the inner and outer rim walls as they spread the load under the nipple heads.
Today there are fans of each design, although it's certainly easier to lace up a ferruled rim.
You won't have a choice with V-section aerodynamic rims, which don't have space for ferrules and don't need them for strength, anyway. Because of its deep, V-shaped cross section, an aero rim has more radial and torsional rigidity, but slightly less lateral rigidity, than a conventional rim. This means greater resistance to the perils of potholes. When you hear claims about exotic materials and treatments, remember that cross section and wall thickness are the major determinants of rim strength. Because the bicycle industry is so closely knit, we find most companies operating with similar technologies and similar materials.