FE1-FE2 (Never played those)
FE3
Pros: Great game and had more inventory space
Cons: (probably just me) a lot of trail and error guesses on what turn reinforcements will appear.
FE4
Pros: Great story, Excellent soundtrack (probably the best) and skills for characters
Cons: Maps can be way too large and also a lot of Trial and Error events (like taking Macbeth's castle and if you don't have moved Levin away from the forest area)
FE5
Pros: Great AI, Great difficulty for FE fans, the ability to capture enemies, and an attempt by IS at realism (fatique)
Cons: Can be way too difficult, (Chapter 22), more trial and error on reinforcement appearance without a guide, and unfinished
FE6
Pros: Basic, had Sprites, decent difficulty, and had support conversation
Cons: No skills for characters
FE7
Pros: Balanced and easy game (considering it was the first game for FE in the USA)
Cons: Long turn waits for some characters support conversations and too easy for a FE fan that played all the other FE
FE8
Pros: World Map and branches of promotion for people
Cons: Way too easy and the story is not great for most of the people
FE9-FE10 (haven't played them only read or saw the cutscenes of them)
FEDS
Pros: Reclassing, Wifi, and H5 mode for the FE fans
Cons: No support conversation, since it's staying to the original means no rescue option and horrible prepromotes (Arran) and for most people the story is horrible.