I'm not an expert on track by any means, but I like that my track bike is a bit smaller lengthwise than my road bike. I put a long stem and track bars (long reach) on the bike but will be reverting to something more normal for this year.
Track bars are so much longer/deeper that they make up for a good amount of TT length.
fyi I ride a 52 Cdale, 53.5 TT, 11? cm headtube, 13 cm flat/73 stem, no spacers. I'm 5'7", short legs, long torso.
My track bike has a 52 TT, I'll be putting a 14 flat stem (not track) and probably 41cm crit bars (same as road bike). If I can find a shorter stem I'll use it, maybe a 12. Right now, with a 14 track stem and 39 track bars, the seat-bar reach is 5 cm longer on the track bike. I hope to reduce it so it'll be about the same between bikes.
cdr