Applying for endorsement via Exceptional Talent does not preclude you from endorsement under Exceptional Promise should you meet the necessary criteria; likewise, applying under the Exceptional Promise route does not preclude you from endorsement for Exceptional Talent.
In all cases, Tech Nation experts will establish whether you meet the necessary criteria to be endorsed for Exceptional Talent or for Exceptional Promise.
Please note that the qualifying period for Settlement (ILR) depends on whether your visa is granted under either the criteria for Exceptional Talent (three years required) or Exceptional Promise (five years required). Therefore, if your application is endorsed under a different route than you applied (Talent or Promise), it will affect your qualifying period for Settlement. Further information can be found in the official Guidance for the Global Talent visa on the Home Office website.