Ok, correct info from most sides here.
The original Galaxy (prior to Gio endorsement) shape are clearly different in shape to the current model sold. I have a friend with trhe original Galaxy's he has a Conga & a Tumba. At a recent latin jazz gig we borrowed his 2 drums to join them with my bro's 3 Galaxy Gio series to play with 5 drums. As we are conga geeks, we instantly noticed the shape difference regarding belly placement so went on to compare them. The lugs/plates dont seem to have changed, what has changed however is the LP badge, originally just LP circle with Galaxy below it, then LP circle with Galaxy below it followed by Giovanni Series badge below that. Now its back to a LP circle again different from the original 2 circles, and no Giovanni series badge. The design of the badges artwork has also changed along the models. Also the height of where the badge goes has changed along witht he series. When comparing my students brand new 3 Gio Galaxys with my bro's older series Gio Galaxys, the badge height definately changes.
Also, the orginal 2 variations of the Galaxy have a different rim. The newer series are slighly extended internally. People with some of the older series Gio's wont be able to fit the prefitted LP skins as the rim placement is slighly smaller. The newer rims are extended.
Another change seen in the series were the comfort curve rims changing to the later series. As well as the later series having the 2 triangle like grooves etched into them near the hole for the lug. Also witht he later series, the bracket on the 1 x lug was added per drum.
All this also aside from the wood changing. The problem with the faults on the originals was so bad worldwide that the only way to rescue and recover the name reputation on the series was to have Gio endose them and have his name on them once the problem was rectified. This was explained to me by someone quite high up in LP while under Martin Cohen.
Now regarding the whole Matt Smith thing, the newer Gio's are design based on the drums he made in ash, LP 'borrowed' them. Gio also went to Matt and had him make him an ash set or single drum (cant remember the qty) with the bands, trad rim etc etc... From there, the rest is under the table so to speak and Matt is unofficially accredited to the design of the Palladiums except for the rim/crown and plates. Shape, design and plate placement however are all based off Matts design.
Matts original design for the drums also included the added height like the Palladiums, though my Ritmo drum is of the stadard 30".
Back to the Gio, here is a photo of my students brand new Gio's. Below that a photo of my 2nd generation Gio Galaxy.
Below some pics of my 2nd gen Gio Galaxy next to my Matt Smith Ash requinto, and the solid shell congas I had custom made in Havana based on my design ideas, for comparison of belly height/lug & badge placement.