Based on reading the Institute for the Study of War's daily updates, I got the impression that they rely a lot more on Telegram. E.g. the most recent post https://www.understandingwar.org/backgrounder/russian-offens... has 90 t.me links and 22 twitter.com links.

Since for the ISW folks, following the war in Ukraine is kind of their job, I think that's a pretty good approximation of the two platforms' relative importance in that area.

The ISW folks maps tend to not really reflect reality so well.

Every time someone lands troops somewhere they mark it as a territory gain, even if the area is still ‘disputed’.

It’s deeply annoying - small thrusts and retreats or probing attacks by either side get marked as territory gains/losses, which is entirely inaccurate and usually the situation has changed by the time ISW posts it.