Check the graph at:
http://www.vassago.demon.nl/19tspec.jpg
The solid line is the Orion V2 19T spec, the other one is a Corally 19T spec.
Geared the same they will accelerate just as quick until about halfway than the Corally will outdistance the Orion.
If you gear the Orion for the same topend you will come up short out of corners.