Here are some crappy pictures of mine-
One is a 2012 Gallium Pro and the other is a 2016 Gallium Pro. I have had the 2012 since 2012 and have absolutely loved it. In 2014 I wanted a new bike so I got a tarmac and didnt like it, sold it and got an Evo himod, also felt like something was missing, plus the frame was out of spec and tire clearance was limited. So I bought another Argon last year (the 2016) and its everything the 2012 model offered, but lighter and stiffer. The bottom bracket is super chunky (in a good way), frame quality was spot on, and I like that they have alloy rear dropouts (unlike the evo). Seatstays are super thin and offer plenty of compliance while the rear end remains plenty stiff laterally. I'm a big fan of 75mm (or more) bb drops, which the Argon has. The dang bike feels so planted, its great.
They made subtle changes for the cable routing between the 2014 and 2016 models, but I believe the overall structure remained unchanged. Only thing I wish they would have done was route the rear brake cable/housing on the left side of the top tube, along with the di2 cable entry to make for cleaner routing, but no biggie, just me being nit picky. The current setup works just fine
If I remember correctly the 2012 version frame weight was somewhere around 1180 grams with the rear hanger, and the 2015/16 model was right at 790 with the rear hanger. Both in size M,
Plans are to get a set of the Bora 35s to complete the build (still debating over dark or bright. But the Pacentis with WI T11 hubs have been fantastic everyday wheels.
A couple changes have been made since the photos have been taken above:
The 2012 now has a Speci Power saddle
The 2016: seatpost has been dropped a couple mm and the bars have been rotated up a couple of degrees (the drops are parallel to the ground in that pic). Setup is virtually identical to the 2012. The Deda bars are a little higher stack wise on the tops, hoods are a little lower than the shimano/vibe setup, as well as the drops. Dont want to bore you with the why, but i have reasons.
Let me know if you have any other specific questions.