Here is a pretty decent review of these E21xx series processors done over at X-bit Labs...includes comparisons with the E4300, some of the previous Intel dual cores and some of the AMD dual cores, as well.
Testbed details:
CPUs:
AMD Athlon 64 X2 3800+ (Socket AM2, 2.0GHz, 2x512KB L2, Windsor);
AMD Athlon 64 X2 3600+ (Socket AM2, 1.9GHz, 2x512KB L2, Brisabane);
Intel Core 2 Duo E4300 (LGA775, 1.8GHz, 800MHz FSB, 2MB L2, Allendale);
Intel Pentium D 935 (LGA775, 3.2GHz, 800MHz FSB, 2x2MB L2, Presler);
Intel Pentium D 925 (LGA775, 3.0GHz, 800MHz FSB, 2x2MB L2, Presler);
Intel Pentium E2160 (LGA775, 1.8GHz, 800MHz FSB, 1MB L2, Conroe-1M);
Intel Pentium E2160 (LGA775, 1.6GHz, 800MHz FSB, 1MB L2, Conroe-1M).
Mainboards:
ASUS M2N32-SLI Deluxe (Socket AM2, NVIDIA nForce 590 SLI);
ASUS P5K Deluxe (LGA775, Intel P35);
Memory: 2048MB DDR2-800 SDRAM (Mushkin XP2-6400PRO, 2 x 1024 MB, DDR2-800, 4-4-4-12);
Graphics card: PowerColor X1900 XTX 512MB;
HDD: Western Digital WD1500AHFD;
OS: Microsoft Windows Vista Ultimate x86.
http://www.xbitlabs.com/articles/cpu/display/pentium-e2160.html