"let" is more elegant IMO.
The usual variable declaration syntax is <type> <name>; it's not a stretch to imagine the type as 'var', a catchall type. But 'let'? Let is a verb; it should be in a place where functions, not types, go. It makes sense in "let x in {}" type expressions, and it kinda makes sense in Lisp, but I don't see any argument for it in a C-like language.
Without jumps, all code can be rewritten to be a series of "let x = ... in <expression>"
The fact Java has statements instead of everything being expressions is a design flaw and should be rectified not glorified.
The inventor of the C-like languages B and NB (which then inspired C) agreed and used the more intuitive auto.
{
auto x = 1; /* x is implicitly an integer */
}