Yes they both use the same tuner.
Here BTW is a Dual user’s experience:
For what it’s worth, I thought I would post my Tablo experience in case it’s of help to other users.
When Tablo first came out years ago, I was looking to dump Tivo as I liked the feature set of Tablo better. Upon receiving one of the original Tablo two tuner models, I found it was unable to tune in several stations that the Tivo had no problem with. I tried adjusting the antenna with no improvement. That Tablo was kinda clunky and very slow overall, at least in my view. Back it went.
Tivo…
I just got a Tablo Dual Lite and the tuner is doing much better than my Tivo Bolt (which I’m going to sell, btw… tired of the Tivo ecosystem). This wasn’t the case in the past as I had tried the original Tablo back in 2015 and the tuner on it was horrible in comparison to my Tivo Roamio which I had at the time.
Did Tablo upgrade their tuners, and is the same tuner in all Tablo models now?
In fact when and if my Tablo dies, I’ll be happy to get the new Dual model myself (especially since I have the lifetime subscription). I’m in a tree surrounded valley and the Tablo works well.
The 4228 is a powerful 8 bay antenna. Is it possible at 5 miles it is overpowering some tuners?