I guess it's a new CPU, just like the dv2z series seems to be a new one, isn't it?
The old series was called dv2-1050eg (or such)
It's just interesting to see that hp already has knowledge about the new CPUs AMD hasn't officially released yet.
So according to them there'll be:
AMD Athlon(TM) Neo X2 Dual-Core L335 Processor (1.6GHz, 512KB L2 Cache)
and
AMD Turion(TM) Neo X2 Dual-Core Mobile L625 Processor (1.6GHz, 1MB L2 Cache)
The old Neo used to be a single-core CPU. The new ones have 2 cores. The difference between them both is obviously the size of the L2 Cache.
It is interesting to see that at the AMD site, both the L335 and the L625 have 1MB of L2 cache. If you compare them at the site, the only difference displayed is the clock speed.