I haven't compared it to the Lamm L2. But I can say that it is very good. Sweet, natural sounding over the entire frequency domain. The soundstage is fantastic. The nice thing is that I find it emotionally involving - - rare for a solid state pre.
I bought it and run it with Accuphase A50v. Great combo!
The only drawback is that its midrange is possibly a tad recessed compared to best tube preamps out there, but then it doesn't drop off at the frequency extremes either! Perhaps it is more honest - - I don't know.