VEU Fund is a Vanguard fund that was founded on December 16, 1998. It is made up of stocks from developed markets outside of the United States. VXUS Fund is a Vanguard fund that was founded on November 10, 2005. It is made up of stocks from both developed and emerging markets outside of the United States.
There is no definitive answer to this question as the two funds can achieve different results, depending on the market conditions. Generally speaking, the VEU Fund may be more volatile than the VXUS Fund, but could also offer potentially higher returns.