It would help if you could give us more info to properly compare with you. What do you consider sure things? What can those rounds get you? What are your team needs if you're considering jettisoning those two?
Trochek has a safe floor of 60-65, I would say. Same for Aho. Whether certain players hit 70+ all the time really matters on whether they are the top option on the team and the competition they face. Aho is the top option. Trochek is second fiddle to Barkov, but plays with him on the PP. While Trochek had the better season last year (I am a huge fan btw) I think his numbers could fluctuate more based on his usage, given the top 6 in FLA. Aho is the top option no matter what. If I had to pick in a dynasty, I would convince myself to take Aho (talent) even though I think Trochek has the better motor.