Quoted from Fifty:There are two smaller SMD in one and a larger SMD in the other, or at least that's the way it looks to me.
Yup. Two SMD lamp has two 2835 (2.8 mm x 3.5 mm). One SMD lamp is a single 5050 (5.0 mm x 5.0 mm). Comparisons are easier now that I know those numbers are sizes.