Pay attention to the color choice of the sealant. Whether silicone or acrylic, the material ages with time. Cheap acrylic sealant in white often yellows, so quality plays a role.
Clear silicone compound, however, is often unsightly due to mold marks. Especially if the gap is slightly wider, the mold can settle under the joint and so shine through the transparent sealant. This is of course particularly annoying, since you do not approach here when cleaning.