Don't eat less than 1694 calories if you want to preserve LBM. Energy requirements 2033 - to create a caloric deficit, you want to eat a few hundred calories under this - so eat between 1694 and maybe 1800 cal or so a day probably. If you want to eat more and still lose, up your activity level. I am assuming the numbers are so close together because your activity level is on the lower side?

Also, remember, these are GENERAL guideline numbers - it is always a case of YMMV.