Ubuntu is a checkpoint distro, Fedora is a rolling distro. There are benefits to both styles. Ultimately I don't think either will particularly affect your productivity, unless they interfere with the software you use.
Fedora, as a rolling distro, is not particularly suitable for (production) servers. You'd use CentOS for that, to keep familiar RedHat-family tooling.
Of course, Debian gives you both checkpoint ('stable') and rolling ('unstable'), so you can use the same thing on both server and workstation. :) Debian's not as warty as it used to be (I came to linux via ubuntu, and have been switching to debian on workstations + servers over the past couple of years)
EDIT: correction, Fedora is a checkpoint distro, but it doesn't support for long. IIRC it has 6-monthly releases with 12 months of support, whereas Ubuntu has 6-monthly with 18 months of support, and every 24 months you get a 5-year version. Basically Fedora needs to be upgraded twice a year, which isn't suitable for (production) servers.
Fedora, as a rolling distro, is not particularly suitable for (production) servers. You'd use CentOS for that, to keep familiar RedHat-family tooling.
Of course, Debian gives you both checkpoint ('stable') and rolling ('unstable'), so you can use the same thing on both server and workstation. :) Debian's not as warty as it used to be (I came to linux via ubuntu, and have been switching to debian on workstations + servers over the past couple of years)
EDIT: correction, Fedora is a checkpoint distro, but it doesn't support for long. IIRC it has 6-monthly releases with 12 months of support, whereas Ubuntu has 6-monthly with 18 months of support, and every 24 months you get a 5-year version. Basically Fedora needs to be upgraded twice a year, which isn't suitable for (production) servers.