Seatstays, the T3 is nicer. Everything else, particularly headtube and forks, the T4 is far nicer. Both definitely nicer with pursuit/aero bars though.
@Sanddancer started
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Seatstays, the T3 is nicer. Everything else, particularly headtube and forks, the T4 is far nicer. Both definitely nicer with pursuit/aero bars though.