Both programs have a lot to offer. There's no doubt that either would be an effective tool for getting your personal finances in order.
Microsoft Money 98 will likely appeal to those with a stronger need to work with their investments. Quicken 98 is just as capable on that level, while also adding lots of household functionality.
Small-business owners who want to start using a program for business may want to consider using Quicken (or its more robust sibling, QuickBooks). This way, there's no learning curve when converting to a computer-based bookkeeping model.