Hello deepansg;
The Core i3-380M @ 2.53Ghz CPU has slightly better performance than the i3-2310M @ 2.1Ghz. The Sandy Bridge CPUs have about a 15% performance advanage over the 1st Gen Core i CPUs at the same clock speed.
i3-2310M @ 2.1Ghz + 15% = 2.415Ghz or a Core i3 370 2.4Ghz CPU.