Both models
3200U and
3500U 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 3200U gets a score of
61.2 k points while the 3500U gets
141 k points.
Summarizing, the
3500U is
2.3 times faster than the
3200U. To get a proper comparison between both models, take a look to the data shown below.