Okay, so I have convinced myself that JC is sort of correct. But only sort of. I reckon I'm going to eat some crow here, too, though.
The Perdix shows 11 pieces of data:
Top: Depth, Elapsed Dive Time, Battery status, Deco Info
Center: T1 pressure, GasPO2, SurfGF (or other custom config)
Bottom: Mode (e.g. OC), Gas, NDL (which changes to Delta +5 Ceiling automatically, once NDL hits 0), TTS
With NDL changing to another thing once NDL hits 0 (and you can configure WHAT thing it changes to in your settings), that really means it can show 12 pieces of data.
The Teric, in Standard mode (i.e. 4 rows), with the "Center Row" set to show the max, 3 things, can only show 10 things.
Row 1: Battery status, Mode, Depth
Row 2: NDL/Deco Info (changes automatically), TTS
Row 3: T1 pressure, Gas PO2, SurfGF
Row 4: Elapsed Dive Time, Gas (shown below the dive time if it is not shown elsewhere on the screen)
That is with my Teric Center Row configured to match the Center Row that is shown in ChuckP's pics.
When configured that way, there is no way to set it to also show Delta +5 Ceiling, as you can with the Perdix.
Basically, the difference is that the Teric combines NDL and Deco Info into one field on the screen. I think that makes sense versus the way a Perdix does it. I mean, you don't need to see "deco info" if you have not exhausted your NDL. And you don't need to see NDL once it runs out and you have a mandatory deco obligation. Also, this is "like" the Perdix field for NDL that automatically changes to (in JC's case) Delta +5 Ceiling. So, if you consider the Perdix to really be showing 12, then the Teric is really showing 11.
So, the Teric combines two fields into one, but then it reduces the total number of fields you can see by 1, and that is where the truth of what JC said becomes clear.
Really, what it looks like when you still have NDL left is irrelevant. What it looks like once you go into deco is what matters.
In deco, the Perdix is showing you 9 things: Depth, Time, Deco, T1 pressure, GasPO2, SurfGF, Gas, Delta +5 Ceiling, and TTS.
In deco, the Teric can only show you 8 things.
All that said, in the pics from
@ChuckP, both Perdixes are showing the tank pressure. I'm not sure if he was using that to show his back gas pressure on both computers, or if one was back gas and the other was a deco gas cylinder pressure. I use AI when I dive OC doubles. But, I only feel like I need the tank pressure to be showing on one of my computers. I do not use AI on my deco cylinders.
So, you COULD use 2 Terics and have all the info to be seen at one time. You would have to have one Teric to show the data shown on ChuckP's left Perdix, except for leaving off Delta +5 Ceiling. And then on your right Teric, you could have the 3 Center Row cells configured to show:
Delta +5 Ceiling, @+5, and GF99
You would just have to give up your redundant displays of cylinder pressure and GasPO2.
So, assuming you're only using one AI transmitter, I feel like JC is not entirely correct because:
Even on a Perdix, you can't display ALL the data he wants to display using just one Perdix. And if you're going to rely on 2 computers to see all the different pieces of data you want, well then you can use 2 Terics and see it all, too. You just lose redundant display of 2 fields (since there a total of 2 less pieces of data shown on 2 Terics vs 2 Perdixes).
My crow that I'm eating is that I'm pretty sure I have explicitly said in the past that the Teric will actually show as much or more data as the Perdix. I realize now that that is simply not correct. At most, the Teric only really has 8 data fields on the screen (beyond battery status and Mode). The Perdix has 9 (plus battery status and Mode).
Here are my Terics showing all the same data that
@ChuckP's Perdixes are (would be) showing: