Bro Karcher and Fairline are 2 different brands which make Pressure Washers.. Just like Suzuki and Honda.. Suzuki ki 1300cc car ki quality low hai and price kam hai as compared to honda's 1300CC car..
Same like this ,, FairLine and Karcher both make washers.. Karcher ka 100 Bar wala washer 8000/-Rs ka hai , fairaline ka 105 bar wala 5000 ka hai ,,, Karcher is Made in Germany, and Fairline Chinese hai ..
Fairline also gives 1 year warrantee. ,,, Fairline is Metro's own brand, Hence I have percieved it being better than other Chinese Orphan Brands.
Hope this clarifies..

