I'd go with the FX3. I have it and love it. I know another rider that got the FX4....only because it was the only choice he had during the Virus shortages...and he is not a fan. His FX 4 is probably a 2020 or maybe a 2021....but it is more of a gravel bike than my FX3. His has the one small front ring with the larger cluster on the back while my FX3 is more conventional with two rings up front and 9 on the back. Just my 2 cents.