Being shot at by a siege cruiser with solarises is tricky to survive when in an Eagle.
Then again, so is being shot at by one with all primaries. The solarises just have more of a 'Agh, it's hitting me!' effect, even if I still have a couple of bars of shield left after depositing my screamer. Actually, I've never had to expend more than 4 bots in the course of a fight due to being hit by solarises. If my shield goes down, I just fly out of range.
I also bump into plenty of Stortas on my Nyx. Though weapon type hardly matters in those cases, and it's not usually me attacking them (and if it is, they tend to prioritise Pythos), so I can't comment.
Statwise, they don't seem terribly impressive. A minor range boost might be in order.
I don't fly the one cruiser I have enough to know how it goes the other way. I don't fly bombers, either.