My 27.2 carbon seatposts have about 0.5cm fore and aft movement (compact frames with quite a bit of seatpost showing) that does make them more comfortable than alloy (road and mtb). It is very noticeable on switching back to the stock alloy post on the steel mtb. The larger diameter post for your frame will be stiffer and have less flex, so the effects may not be as big.
If you drop your post IME they score and look very tatty quite quickly – I’ve only dropped mine a few times on some proper dodgy stuff and it’s scruffy. I probably won’t bother again, can’t say I’ve noticed it being any more comfy than ali but I’ve not done back to back testing and it’s a 31.6 maybe a narrower post would be more compliant….?
Isn’t the point of a dropper that it gets out of the way?
rephrase: possible bike packing trip, I’ll likely want to hang a bag off the saddle and I want the bike to be as mechanically simple and robust as possible, so better to switch the dropper for a rigid post I think.