Isn't it a rebrand of MX250, Pascal based, IIRC whilst the Mx450 should be Turing based. There's no way anything with 64bit wide bus would come anywhere near 1050 in performance, unless they've significantly bumped the specs & it has GDDR6 memory.
Not quite. It's a different chip. MX250 is rebrand of mx150 aka laptop gt1030 using gp108 chip(aka mx330). MX350 in other hand uses gp107 chip, same as used in gtx 1050/ti cards. So it's actually a 1050 with half the memory bandwidth. It will probably have nvenc too which gp108 lacks(unless that is disabled by nvidia).