A Gundam deck is a main deck plus a separate resource deck. Compare two lists and see what changed in each one.
Deck A
Deck B
The main deck is 50 cards and the resource deck 10, and each is compared as its own zone.
Gundam constructed play has no sideboard, so nothing is compared outside the two decks except your maybeboard, which never counts towards the totals.
Units, pilots, commands and bases are compared card by card, so moving from one pilot to another shows as one removed and one added.
Yes. It is compared as its own zone, next to the main deck.
No. Maybeboard cards are shown but never counted in the totals or the upgrade cost.
Yes. Copy the link, or copy the changes as text, grouped by zone, to paste wherever your group talks.
More in the deck compare FAQ.