Not getting any help from the crew on this one, eh Ron!
I share the same physical setup as you and I am still learning the ropes on various cats, so this interests me too.
One would think that, on a well-tuned boat, having the dominant arm and eye forward (starboard tack) would provide a better sense of balance, vision and control (while flying at least) but this may not be the case. Maybe the "Goofy-foot" analogy is closer to the truth when sailing. (Righty's feel more natural leading with their left side). Boxing and other sports - same thing.
The direction of wind, currents and waves probably have more to do with your speed, as will ballast or the condition of your boat. Any of these could make the port tack faster for you. Owners of furling sails sometimes report seeing a difference on one side.
So your "dominant" side may have little to do with it, but there is one way to find out.
Put 2 marks perpendicular to the wind, along a constant depth and have your left-handed crew time your speed runs.
When that's done, let them sail the course several times and compare notes.
Maybe you can settle this - and find out if both of us should be doing more "left-handed" curls.