i'm going back again, if you want I can carry back

not now, but I will go to US again and if you want I can carry back

There are some difference between this 2 models and also DWS1000.
There are few main difference between AP Easy Complete & DWS2500T-CN as below:
1) Technology: Ap Easy Complete is using High Efficiency Carbon Block; DWS2500 is using High Performance Silverized Carbon Block

2) Micron: Ap Easy Complete (0.5 micron); DWS2500 (0.2 micron)

3) Removal Capability:
AP Easy Complete remove 99.5% of filterable cyst, VOCs* & Mercury (*VOCs include: Lindane, Atrazine, Benzene, Carbofuran, 1,4-dichlorobenzene and Toxaphene) & Etc...;

DWS2500 remove 99.99% Protozoan Cyst, 99.99% Water-borne Bacteria, Full VOCs (Volatile Organic Chemicals) & Etc...

If you wish to find out more about the products info and what are the rest of differences, you may come to our Damansara Uptown showroom. We have the live DWS2500T-CN model can let you taste the filter water directly.
Ap Easy Complete
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DWS1000
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DWS2500T-CN
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can i have 1 too... thinking to get one... how about the replacement?

eSpring is the world’s No. 1 selling brand of home water treatment systems. However, whether it suits your requirement or not depends on you.

Coway is RO water which is demineralised water. WHO did a report on the health risks from drinking demineralised water. So it is not recommended to drink RO water.

NSF certification certifies what the water filters can filter. It is proof that the claims from the manufacturer on what the water filter can filter is true. It also shows what contaminants can be filtered. That is why all water filters want to be certified by NSF, but not all can.

eSpring has 4 NSF standards (42, 53, 55 and 401). You can check it on NSF website.