From what I have read in various places on this forum “What I refer to as V1 has two separate tuner modules, as yours has, so the RF/aerial sockets are arranged horizontally. The V2 has a single twin-tuner module with the RF connectors arranged vertically.”
The disassembly photos show 2 cans for a V1
I have a 2000T which has Broadcom tuners on a chip.
Really as you can tell I don’t know... Just trying to find a good T2

Still don't understand your reference to silicon.
The difference between the original and the RE version is that (I guess, not being in "on the ground floor") they couldn't get the original tuner any more, or there was a significant cost saving by re-engineering to use a twin-tuner module. The new tuner version required a firmware change to accommodate it (so it won't work on pre-1.03.06 firmware), and we can reasonably assume 1.03.06+ firmware detects which tuner module is fitted and issues the correct commands for that tuner.
So far as I know, there has never been any reference to "silicon" specifically. So far as I know, there is no reason to choose one over the other (it has been mooted that the RE version's fan blows inwards rather than outwards).
You might be talking about SDR (Software Defined Radio). This is the use of advanced digital signal processing to extract signal from a broadband RF spectrum. I don't think we've ever considered whether the HDR-FOX tuner can(s) use SDR principles, but personally I doubt it being as the desired frequency band and modulation for DVB-T is well defined and it will be a lot more cost- and power-effective to build hardware for that specific purpose rather than bung some heavy computing power at it.
Then you posted again...
has Silicon tuners as the CAN tuners ceased production
Okay, so you should have capitalised the s in Silicon - I take that as a manufacturer rather than a material (ditto CAN). I stil don't know of any reason to choose one over the other, it will just be a question of what you can get.
I have a 2000T which has Broadcom tuners on a chip.
Reference? Unless Broadcom have branched out, I suspect you mean decoders rather than tuners.