Reporting I saw a couple of hours ago (courtesy of Kaitlan Collins’ twitter feed): U.S. ambassador Michael Carpenter: “We assess that Russia probably has massed between 169,000-190,000 personnel in and near Ukraine as compared with about 100,000 on January 30. This estimate includes military troops along the border, in Belarus, and in occupied Crimea; Russian National Guard and other internal security units deployed to these areas; and Russian-led forces in eastern Ukraine.”
So, this estimate includes Russian-backed separatists, which I gather were not part of the previous estimates of 150,000. It also includes “Russian National Guard and other internal security units” which are usually not offensive forces.
The Ukrainian Army has 170,000+ mobilized. Don’t know how many they have recently mobilized but would not be surprised to find their mobilized strength currently exceeds 200,000.
The real difference in strength is in airpower, which I will post about soon.