You can get second opinions of the 2 card models from the 2
manufacturers from reviews but if you are not particular about the
manufacturers but just want to get a card and use it it shouldn't
matter much.
Graphics card manufacturers have the rights from nVidia to make
products from their patented chip design and concept but has no
rights over the components and semiconductors, board or other
discrete components used for the products assembly. Some
manufacturers may have better and more dedicated manufacturing
facilities, workforce and QC methods as compared to another. After
sales servicing and RMA also serves as a strong selling point for
individual card vendors.
I did some searching and Xpertvision is a trademark of Yuan
High-Tech Development Co. Ltd. A name which may not be as
well-known for outsiders of the semi-con industries when compared
with the likes of MSI or Gigabyte.
Xpertvision
Co Info
As for Leadtek, most enthusiasts will never miss it as the
trademark for Foxconn's range of graphics card products. Many
subsidiaries and companies under the flagship name 'Foxconn' making
and dealing with products ranging from metal formed and plastics to
cables and semiconductors, and Foxconn's years of existence in
supporting the OEM markets made the campany's name reknown.
I believe the Xpertvision card should work well. For assurance you
may want to make a final check for reviews on compatibility issues
of your motherboard with the graphics card which you are going to
get.