First comparison beetween AbiWord on MacOS X and iWork: the disk space required. According to this article from Mac4Ever (fr), Pages, the word processor application from iWork require 448MB to install. In the other side, AbiWord on MacOS X uses 18MB.

Lightweight install: AbiWord: 1, iWork: 0

Update (01/14): This was intended to be some humoristic comment. I don't have the software, and I don't even have the hardware to run it, as my PowerBook, running Linux, is not enough according the their specs (given that I install MacOS X), because Pages require 500MHz processor.

Update: You can thanks the people that confuse this blog with a tech support area. I'm closing the comments for this one.