PD: which is better among fedora or ubuntu for scientific modelling purposes without sacrifice a stylish visual interface?
what software ?
i use NASA/AMES/JPL "isis3" and "stereopipline"
but on ScientificLinux 6.3
these programs WILL not work well on Fedora 17
( though ISIS3 for RHEL6 dose run on opensuse12.1)
so the REQUIREMENTS for the software you are using ,is VERY important.
Ubuntu is popular
RHEL/CentOS/SL are meant for use in the Lab.
and with the now 10 year lifespan of RHEL6
that is why it is the base for CERN's and Fermilab's use of it for SL and "fermi linux"
switching from debian 6 to RHEL( or a free rebuild) 6 will take some getting used to
( or running fedora 17 - but with fedora's 6 month release cycle ????
fedora is a VERY VERY fast R&D distro -- NOT good for the Lab. )
but BOTH are long life STABLE distros
as to installing
any major linux distro should AUTO see the windows 7 install and not destroy it
-- but mistakes DO HAPPEN !!!
-- so BACK UP YOUR DATA !!!!!!!
however YOU will have to do a custom install for the bootloader to install it on the FIRST LINUX partition
-- the default is to but it on the MBR ( and windows is there )