Keeper League Bell vs Kamara

Need feedback on decision to keep Bell or Kamara. Modified standard scoring system with length of touchdown bonuses. Bell and Kamara scored equally in 2017 in my league. You can keep a player forever. My concern is Bells age and mileage. Kamara is a second year player with many years ahead of him. I’m leaning keeping Kamara. Thoughts? I can only keep 1. No lost round/pick for either.

Since its keep forever I would lean kamara as well… I think kamara takes a step back this year… But long-term I think he is the guy and he will stay in a good offense…

Kamara for sure