Hey raid, I live in Florida also. We're kinda like neighbors. So Howdy.
I don't think the GSN is more advanced. I'd guess they take pictures pretty much the same as the black GT's. If anything, the GT was billed as Yashica's top of the line, but was mostly eye appeal for that more modern 70's cool bad fad look.
I'm a sucker for the classic brushed chrome. What can I say. It reminds me of the 60's, and I think the 60's were way cooler than the 70's, but that's just me and my silly emotional childhood attachments.
I love my GSN. It is simply awesome. But I'm not sure it would make a good travel camera though. It's clunky. It's cludgy. It's got a flimsy aluminum lens filter ring that juts out there and begs to be banged and bent. It's big and sort of delicate feeling where it tends to make me feel sort of overly protective of it. Kind of like it's a baby, a big metallic cycloptic baby.
I really think I have a love/hate thing going on with my Yashica GSN. I hate that long squidgy shutter button. I hate that kind of cheesy hollow feel of the camera body and I hate that flickery red under expose light that comes on briefly every time I press the button down.
But I love the results. I love the lens. Kind of a puppy love. You know how you just gotta love the puppy, even though it pee's on the carpet.
And I really think that big ole Yashy hangin on my neck like a baby or a puppy or something, causes me to have better interactions with my photographic surroundings. More up front and open. But that's just me.
I'm just blabbering away. 😀