My 44 cm Jamis Coda (flat bar road bike, similar to FX) felt bigger than my 48 cm Kuota road bike.
My custom road bike feels MUCH bigger than my Kuota, until I am actually sitting on the saddle and riding. After 2 years, I still have to remember to push myself way up as I get on the bike and start, or I hit my azz on the nose of the saddle, catch my shorts, and generally do something really spazzy.This bike is more upright and I guess that's the difference. Some have told me I got used to the wrong geometry, and for me, change in something I have to get used to physically is very difficult.