P.S. Sorry. I get a bit Meldrew..ish sometimes..
However.. it is pointless to compare a P3.. which..as far as I know is a fairly consistent beast apart.. maybe..from the cartridge.. or PSU..or something.. or indeed any other record player... with 'an LP12'....which, frankly does not exist. There are so many iterations of LP 12 from the very earliest to now.. that it is pointless to speak of 'an LP 12'. or 'The LP12'. I do not believe that even the mythical 'character' of the LP12 has been preserved through 74000000 'upgrades'.
Thus. you can only ever compare YOUR LP12..with whatever else you are considering. That.. is your choice..
Now.. without nai ..er naming names. I firmly believe that some people's Brand Loyalty deafens them to reality. Further.. I also believe that many people seek personal validation by purchasing that which is 'seen as'.. 'the best'.. so that they can join some sort of 'Approval Club'. A social construct.. bugger all to do with audio quality.
Listen to stuff.. Buy what you think sounds best. Nobody else can hear what you hear.
I agree with some of that, but not all. There are a few defined specifications of LP12 at given price points to suit a range of budgets, the zillions of “upgrades” are largely third party offerings, so one could argue (and the argument has been had many times) that an LP12 fitted with third party components beyond tye arm and cartridge, is no longer truly an LP12. My LP12 has a Roksan arm and Ortofon cartridge, but that aside, it’s all Linn, and I knew what I was getting before I bought it. It’s not my first LP12 either, I’ve owned and auditioned other stuff in between, but was missing something... I can’t describe what that something was, but I have it back with my LP12.
I did look into a Gyrodec and I’d still like to own one, but the (my) LP12 edged it for me. There are a few definitions of that deck too with different motors, power supplies and suspension upgrades, and of course there are a wide variety of arms used on them, that happens with a product that has been in continuous production for a long time.
As for brand loyalty, although I literally have Linn in my username, I don’t like everything they make, or do... you might be surprised to learn that I have Naim, Cyrus, Quad, Ruark, Rotel, Rega, Royd and Pro-Ject products in the house, and I like all of them in the right combination... in fact I’m seriously considering ditching an active Kaber system in favour of a a simple Naim/Royd system... with a Pro-Ject turntable, which might get replaced with a Gyro!