A lot also depends on your riding style. If you are looking for a criterium fit, bent over as far as possible for maximum aero effect, then go for the smaller frame because you will get more seat height to handlebar height difference. For a more relaxed fit, then go for the larger frame.
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Il faut de l'audace, encore de l'audace, toujours de l'audace
1980 3Rensho-- 1975 Raleigh Sprite 3spd
1990s Raleigh M20 MTB--2007 Windsor Hour (track)
1988 Ducati 750 F1