sir pure pakistan me yehi compressor install hota he small to large cars, vans, i have personally seen it and been with ac mechanic....coz its really good.....its a japanse toyota duet compressor..
the reason is that japanse cars already have awesome cooling structure, so these compressors works very well, i had installed it in my vitz 2006, 1.3 and cooling was top class always...even on idle....
but since passo is 1.0 and passso is famous for having bad ac in heat....you may not get same performance even if you buy genuine compressor....so you can give it a try
one thing more, this compressor is cluth based, so when you will turn on, engine power will be reduced a bit...like pulling back....if you dont want this, then go for sensor based compressor which is very costly