Tablo 2 receivers vs tablo 4 receivers

Tablo 4th gen ota 2 receiver VS tablo 4th gen ota 4 receiver.
will the 4th gen 4 receiver allow you do use fast forward,pause and rewind feature. I was under the impression you cannot. That is why i opted for the 2 receiver. Amazon had it as NO

I ment tuners not receivers

There is no difference between the two except for the number of tuners.

FF, pause and rewind is available for live TV on the 2 tuner version. The thumbnail preview while doing FF and rew is only available when the recording has finished. The same is true for the 4 tuner version. The only advantage is that it can record 4 shows at once instead of two.