I'm running track drops with a Nitto Pearl 9 (which in actuality is around 98mm/100mm). But I'm not satisfied with it because I have a short head tube and it's preventing my stem from going all the way down thus making the stem protrude too much.

If I were to swap out the pearl for a jaguar, what size would I need to get to compensate for the drop? I'm trying to keep the reach relatively the same and I usually only ride on the top of the bars. Should I go shorter and get an 80mm jag or stick with a 90mm?