Both models
3350U and
3550H are based on
Zen+ architecture.
Zen+ is the second generation of Ryzen processors. It uses the 12nm process by GlobalFoundries. Other than that, the die is the same than first generation Zen. It comes with 64kB of L1 cache and 512kB of L2 cache per core. There are 3 variants: Pinnacle Ridge (desktop), Colfax (high-end desktop) and Picasso (APU).
Using the multithread performance as a reference, the 3350U gets a score of
144.8 k points while the 3550H gets
178.3 k points.
Summarizing, the
3550H is
1.2 times faster than the
3350U. To get a proper comparison between both models, take a look to the data shown below.