Yeah, I'm wondering the same thing. Especially because according to Busardo's tests, the original Pico (at least with an earlier firmware) could only even reach a full 75W if you were using a coil in between something like 0.4-0.7ohms. My figures might be a little off but point is, his tests showed that (for example) setting the Pico at a full 75W with a 0.2ohm coil would only end up with around 60W of actual power even though none of the advertised limits should have been surpassed. I think some Chinese companies don't understand the difference between current draw on a regulated versus mechanical device.... Anyway, yeah, I question if the same issue will be present on the Pico 25, forgetting for a moment about whether or not it's the best idea to be using 85W with a single 18650 anyway.
I've got to imagine the 10W bump is almost entirely in response to the AL85.
I should probably know the answer to this question but I don't: does vaping at 50W (again, for example) on a mod that is capable of 85W save you more battery life than a mod that is capable of 75W? Or will the difference be negligible, all other things being equal? Obviously I'm asking about the 75W vs. 85W Picos/AL85/other one-battery mods, not about some theoretical dual-18650 85W device vs. a single battery. Agreed I would DEFINITELY get something else if I wanted to actually use 85W, or probably even much more than 60...
All that said though, like you I'll almost certainly get one to add to the stash, since I have slightly more faith in the longevity of an iStick than the AL85 just based on my own personal experiences. I'll probably even get a tank IF the coils are interchangeable with any other tanks, like the melo2-3/iJust heads and Atlantis coils.