Explain Coinomi and Edge fee difference?
Given that you are looking at two different wallets on two different pieces of software, the transactions that the wallets are proposing are different:


they may be using a different count of inputs
one may be using segwit inputs while the other uses non-segwit
one might be a multisig wallet while the other is single-sig 
one of them might be able to avoid a change output, while the other doesn't


This will cause the two transactions to have a differing size. Lastly, the two wallets may be using different price sources to translate it to dollars.

As the transactions' priority is determined by their fee rate, both of these transactions are equivalently prioritized at 200 sat/B. The size difference is unlikely to make a big difference for block inclusion.