Both AMD and Intel make inexpensive processors for the cheaper end of the market (usually by having less cache memory as this is expensive).
AMD's cheap CPUs are the Sempron and Intel's cheap CPUs are the Celeron so both the CPUs you listed above are at the slower end of the market.
Having said that the Intel is faster, as from the speed I guess the AMD is 3 or 4 years old.
BUT you cannot just buy an Intel CPU and stick it in a laptop that currently has an AMD.
Intel and AMD have TOTALLY different sockets and number of pins and it just will not fit.
Anyone who builds a PC and wants to buy a Motherboard has to buy one that takes an Intel OR and AMD, you cannot have one that does both.
In fact some motherboards will take only a certain TYPE of Intel CPU, or a certain type of AMD CPU.
As an example, look at this processor here.
http://www.novatech.co.uk/novatech/specpage.ht ml?AMD-S73064
It says Socket 754. So it will only fit a motherboard for AMD CPUs with a socket 754.
There are other AMD motherbaords that have AM2 sockets for example.
I am afraid upgrading is a very complex business.