Semi-clone, not that there is anything wrong with that. I would define a semi-clone as a character who has more differences in abilities than what is the same. Thinking about this earlier, Luigi actually has seven of the same moves as Mario. Those are up air, back air, neutral air, fireball, even though one bounces and the other doesn't. I'm not taking properties into consideration here. Up B, down smash, and up smash. Out of those seven moves, Luigi is different in other areas when it comes to attacks.
Isabelle in comparison to Villager so far:
Green - Different
Red - Same
Grab - Net
Dash Attack - Tripping and falling
U-tilt - Broomstick
F-smash - Party Popper
D-smash - Splashing a bucket full of water
B - Pocket
Up B - Balloon Trip
Forward B - Fishing Rod (Looks like a command grab)
Down B - Lloid Rocket
Nair - Cheer Pompoms
Final Smash - Town Hall (Different building being built, but still the same as Villager's)