Both watches are priced same, at least excluding Solar version, but Forerunner 255 has multi band GPS and color screen, I have a sort of regret for the purchase of I2 months ago, I know they are porting some software features from F255 to I2 (HRV status, acute load and running power), but I think that to be on par they should port something more, even from F955. Training readiness would be great.
What do you think about?