How is LAMM LP2 compares to the more recent phono

It is very musical, albeit it is just a slight bit dark sounding. It is a top of the line phono preamp, that can compete with some of the very best. It is very quiet for a tube phono preamp, with very black backgrounds, assuming that one does not use a really low output cartridge, say less than a 0.50 MC cartridge. (FYI, I own Lamm equipment, (M2.1 monoblocks), so I tend to be fairly enthusiastic about their equipment, so take that into account.)

However it is somewhat limited by its set configuration.

The Gain is specified at 57.5dB for MC, and 37.65 for MM. Input impedance is 400 Ohms for MC, and 47kOhms for MM.
(Hopefully one of those two settings will work for your cartridge. If not, well .... perhaps this is not the preamp for you. Personally, I would have loved if it had been a bit more flexible, and if it had balanced inputs and outputs, (as I run my analog in balanced mode.)

My two cents worth anyway.

I also own Lamm amps. I agree with Kurk_Tank that the LP2 is on the dark side. I would suggest you try out other current phonostages as many as possible. The current ones are more flexible so that you won't be limited to only a handful of cartridges. I tried Audia Flight, ARC PH7, Einstein Turntable Choice single ended, etc. They are also in the same price range.

From the tonal structure, the reality of reproduction, detail of notes and you will notice the total lack of any mechanical artifact present which is dominant in a majority of Phono Stages today. There is the delicate balance between the Instruments, the different gains in the structure, which is very, very rare to get.
It serves the music to the connoisseur, who understands what he hears. A bargain.