I don't think Tron uses BFT and so it does not have transaction finality, which is the huge missing feature point.  Semux wins on this point as it has tx finality after 1 confirmation.

dPOS (which both Tron and Semux have) is OK, but only if you've got BFT and transaction finality does it really become significant.  This isn't a feature Tron can add either.  The network has to be developed from the ground up as a BFT system.  Semux is miles ahead here.

Semux also has the advantage on the decentralization.

Semux has 100 active "delegates" whereas Tron only has 27 active "representatives".