I am not sure how the MiG can be an even swap for the F-16. Don't these two aircraft have noticeably different missions?
Yep, the F-16 Block 50/52 is a multirole fighter. It carries a very wide assortment of weapons which allow it to be used for everything from dogfighting to bombing to anti-ship missions. The Mig-29A that Poland currently has is a point defence fighter optimized for dogfighting. It is a deadly dogfighter, but it can't do much else, it can't even carry guided air to surface weapons.