Potentially, Ubuntu supports many more packages than Red Hat. Red Hat itself is small in terms of packages and bundled applications - and Red Hat don't necessarily support EPEL packages coming ultimately from Fedora.
If you absolutely positively have to have something supported for up to 10 years, and incorporate FIPS / PCI credit card processing / needs to work for US Government or similar or (insert $$$ generating vital commercial thing that requires heavyweight regulation here), then Red Hat and IBM might be your answer.
If not, there's Ubuntu Pro (or Ubuntu with third party support).
If neither, then there's OpenSUSE / Debian - and you may get just as good support from something completely non-commercial like Debian as you actually do from one of the paid for support plans from others. You will have to convince beancounters and bosses of this, of course.