Welcome to YT
I am so very sorry for your loss of sweet lil Sassy.
I have had several yorkies all now past. Each of my yorkies had different personalities, no two were the same. There was for me, no comparing a passed to the present, all had their own lil quirky ways, lil naughtyness that you just cannot get mad at but laugh or smile because yorkies are to darn cute to get mad at lol.
I now have a rescue little boy, my first boy who is so different from my passed girls. For me, there is no other breed then a yorkie and I have had several other breeds before I got hooked on yorkies.
If you feel the need to share your love I say, go for it, get another yorkie, they are all "one of a kind", Sassy would have wanted that for you