GoBlue! once bubbled...
Do you & your spouse have identical gear (particularly, regulator/computer...BC/mask/fins, etc. really doesn't matter)?
Jim
THE COMPUTER is the main thing that you want to be exactly the same. Particularly when you are NDL nitrox diving together. We both use the Suunto Vyper, except mine is black and hers is teal (our favorite colors, respectively).
Mask -- definitely not! Hers is a TUSA in teal and mine is an Ocean Master in black.
B/C -- color and size is the main difference, otherwise we both sport the same brand (Zeagle) and style (back-inflation).
Regs -- We both use ScubaPro Mk 20 / S600s. Her gear is actually 1/2 of my tech gear. I get the left post reg, she gets the right post reg. The octo 2nd stages come off my deco bottles. The long hose goes into the gear footlocker, replaced by a short 27 inch hose that is perfect for her to wear on a necklace as a backup. We both donate our primary in an emergency, and then go to our own necklace-d backup. That's how I taught her, like a noveau tech diver.
Suits -- she likes her wetsuit, and she feels that a drysuit is just one more thing to worry about (suit inflation / suit squeeze) that she doesnt want to worry about. When she is ready, I will get her exactly the same drysuit as mine, however, except different size of course.
Tanks -- she loves the white Fabers; I prefer the silvery PSTs. Thats perfect however, because in low vis I can see her white tank more easily that way. My RMV is 0.75 and hers is 0.70, so there is no reason to wear different sized tanks. She is tall, same height as me. Even so, her lungs are still smaller. She calls me The Crocodile. I call her The Kitty. I am a very happy crocodile whenever I am diving with her.
Fins -- I got her a set of short fins, forgot the brand name. Something akin to my ScubaPro jets, but not as rigid and stiff as the ScubaPros.
Color and size seem to be the primary differences, other than her reluctance to try a drysuit yet, and the TUSA mask, which fit her better than the Ocean Master did. Ocean Master does not come in teal, whereas TUSA has a beautiful low displacement wide vision teal colored mask with matching snorkel. The color made her fall in love with it. Im just glad it fit her slender face perfectly as well.