Cygnet was based on an iQ, not an Aygo. I also have an iQ and it feels like a full sized car inside, seats are a bit skimpy though. It does share a luxury Lexus GS component as well. The air vent toggle!
I swapped my very large and comfy 2009 GS450h for a 2018 Jazz Sport. No leather, not as plush but the seats seem as comfy as the Lexus over a 400 mile drive. MPG pretty much halved.