Replying to How much will my skiing improve going from 90 to 130 flex?

I'm 5"11, 180 and I have technica agent 90s with surefoot liners and they fit great, but they're not stiff enough. I ski a bit of everything, trees bumps pow, general all mountain shit but rarely park. will I notice a huge difference in control if I go to a higher flex boot?

also, if I got a pair of agent 130s, are they the same fit as the agent 90s? like ould I put my surefoot liners in them? thanks.