As the screw pattern is not the same, I assume you had to silicone fill all the old holes?
rob
My Grandby is old (1976) so I had the old style draw latches so I was drilling new holes anyway.
Old holes were filled with caulk and were covered by the new latch footprint.
I agree with WSage, unless you are adjusting the latches periodically rust on the threads will just lock them in place.