Original tire is a Vee rubber 2.50-19.
This tire is a Shinko SR241 3.50-19.
My Dad also has the same bike.His had the larger tire, mine had the original. We could not feel a running difference but we could tell a traction difference.
On the same hill with the same rider, the original tire would spin, the larger tire did not.
For $50 it's a good experiment.
This picture is a better comparison. I did not have an accurate scale so I showed the weight bias old to new.