If you notice the boxed picture, the blister is slightly larger, that's probably why it is more expensive. (I know a lot of people already came to this conclusion)

The blister is bigger to accommodate anti-radiation shielding. It's to protect casual observers from suffering any ill effects of the Starviper's innate awesomeness.

I'm just glad its out, I will not hesitate to get one and I like the opportunity for Outrider VS Virago matches

My bets for named pilots

Xizor as the highest PS (duh)

Guri (I doubt we will see the Stinger so this is her chance)

maybe a 3rd Kris (the Black Sun Vigo from Shadow Games)

If you notice the boxed picture, the blister is slightly larger, that's probably why it is more expensive. (I know a lot of people already came to this conclusion)

Since the consensus is that this is also the case of the Decimator, you are likely correct