Both are equally good bikes. Both are similar in style. Any differences are more of personal preference.
If the Honda Shadow were really superior to the Suzuki S50 everyone would buy the Shadow and no one would buy the S50. Suzuki would be forced to stop building a model that they could not sell. Last time I looked, Suzuki was still selling lots of S50 bikes.
If the S50 were really any superior to the Shadow, people would only buy the S50 and no one would buy the Shadow. Honda would be forced to stop making a model that they could not sell. Last time I looke Honda was selling lots of Shadow motorcycles.
Go to both the Honda and Suzuki dealers. Sit on both bikes. Take them out for a test ride if you can. Pick the one that YOU like best. Not the one that some stranger on the Internet picked for you. You will be much happier with your choice.