I fish the South Platte and a lot of other creeks and rivers in Colorado a fair amount. Felt soles are fine but I do slip around some in them. I also have rubber soles with large screw in carbide and steel cleats. They are by far a lot more secure both in the water and out of the water.
However if you have the rubber sole with the tiny style of a button stud then I would say get the felt.
Rubber and studs will be better for cleaning.
dB
Sanitize your FF equipment and wash your boat, trailer, livewells & sumps. Wash your wading dog