The Husqvarna Svartpilen 401 is a reskinned KTM 390 Duke with both bikes sharing the same engine, chassis and feature-set. As such, the Svartpilen will offer you considerably more performance than the CB350RS, and it will also have the stiffer suspension setup – it’s not harsh, but definitely feels more taut than the Honda.
On the other hand, the Honda CB350RS is more laidback in terms of its seating position and torquey, air-cooled engine and will have a much lower performance ceiling than the Husqvarna. Its suspension is quite well-judged and will likely be more pliant than the Svartpilen, too.
You should take a test ride of both bikes to see which one suits you better, as both bikes have very different personalities and price points.