I hope you realize you are the exact same distance from the ground on both bikes? The height of the TT has no effect on CG with your carcass planted high above. Parking lot test rides over emphasize tight cornering, while in reality you spend the vast majority of your time powering straight ahead and carving broad arcs at speed.

When I got my first road bike that was properly fit, it felt totally huge and sluggish. It was 2.5" longer in the TT than what "felt" right before getting a professional fitting. It took a few months to fully realize it was indeed better in every measure, and better at carving turns.

I say fit is king, but if both fit, and you can achieve your target riding position without a custom stem, either is fine. "Quick" handling becomes "twitchy and tiresome" after a few miles though.