Size comparison with a cigarette pack

One thing though.. the joint strength has improved, but it feels like the center of gravity has shifted further back.
So you need to lean the body forward more to keep it in standing mode.

The articulation on the arms and legs is pretty much identical too.
But the key difference is that the joint strength has improved dramatically.

First off, the waist parts have been changed,
giving the waist a pretty wide range of forward and backward movement, and the holding strength has improved as well.

The rear knee armor parts have also been improved.
On the 1.0, there was an issue with the fixing mechanism where bending the knee would cause the small armor piece behind the knee
to pop off easily, as you can see on the left in the photo above.
By changing to a design where this armor part is fitted directly onto the knee joint, the problem of it falling off during posing is gone.

The equally flimsy ankle joints have been replaced with the larger, sturdier parts shown on the right.

As a result, the ankle area has also been made a bit more substantial, giving it better stability.

The assault cannon has been upgraded too, though at first glance it looks the same.

You can also notice that an articulated joint has been added to the parts that store the assault cannon on the back.

So the weapon parts have gotten a bit more substantial overall.

The assault cannon, now configurable as a support assault cannon.

Leftover parts.
These are all parts left over from the v1.0, so just looking at this photo you might be able to figure out which areas were upgraded.

The articulation is pretty much identical to the v1.0.