MFSTools w/ Recordings copy but to DIFFERENT Model TiVo

So I've seen this question asked various ways, but I'm looking for an answer specific to my scenario.

I (finally) bit on an upgrade to replace my nearly 10-yr-old tivo hd box. In choosing a Roamio w/ lifetime, I will have no time constraints in getting recordings transferred.

Thing is...I'm torn as to the method in getting the recordings transferred. Tivo's method seems OK as the copyrighted shows aren't that big an issue.

I've twice replaced the HDD in the tivo hd. First one was to get...

MFSTools w/ Recordings copy but to DIFFERENT Model TiVo

MFSTools w/ Recordings copy but to DIFFERENT Model TiVo