Well, while this is an older thread, no problem in opening it.
As noted in my OLD post, the RENE guide does list your gun as the first KNOWN serial number, at that time. Since Ruger doesn't release actual info, and we can only go by what members here send chet15 for info for the RENE. Only Chet15 can give you an update on the reported numbers.
Is it rarer? Somewhat, and might carry a slight premium to a serious collector of those guns. And, then only if in NIB condition. We do have a few MKII collectors who may be able to help more.