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@EdwardZ
Depends upon your position. Road and track sizes are different. Up until the 1980s and STI/Ergopower, one shifted with drop-tube levers, seatposts where 20cm or shorter, bars were deep and one spent a lot of time in the drops. Track frames where typically smaller than road to position the bars lower and to account for the higher bottom bracket. These days road position is more aerodynamic, one spends a lot of time on the hoods. Contemporary road handlebars tend to be quite shallow. With a track frame one probably also does not want to have many, if any, spacers and shorter stems. Depending upon the discipline a track frame might need to have a longer headtube than a road frame. One also tends to a have bit less saddle setback. This, in turn, calls for frame with a slightly longer (1cm or so) reach, resp, top-tube length or steeper seat-tube. This results in track frames that tend to be a bit larger than road!