Current vs Previous TiVo Mini Model For Use with Roamio OTA?

I just purchased the Roamio OTA and have it set up in our master bedroom. After a couple of weeks I plan to get the Mini to be able to view programming and share recordings on the DVR in our den, assuming we are still pleased with the TiVo at that time. The older model Mini is available for about $40 cheaper than the current version and I'm wondering what reasons besides the RF remote I might want to consider spending the extra $$$ for the latest one. I will be using mainly a Harmony universal (IR) remote in the den so suspect the RF feature may be a waste, unless for some reason I decide to swap the Roamio/Mini locations later on.