IIRC when you purchase an item there's a nice comparison function i.e. select a unit, see data displayed upper right, then as you mouse-over other units the data is compared to the unit you clicked on. Very nice.
Just now, doing a unit upgrade, that lovely mouse-over enhancement didn't work. I had to click on another unit to see what the data was.
A mere quibble!
After years away, I'm really thrilled at having found / purchased / installed / played Panzer Corps. I'm spending more time with it than I am with ArmA ... even more than with DCS and WarGame: Global Escalation!
So much fun ... so grateful.

-ben aka Dawks