TimeNet Law is all-around a better solution for attorneys. It's more flexible for the way attorneys work, it's automatic payment system is very robust, and everything from the lingo and order of input in the user interface to the way monthly billing is performed, and everything in between, will feel much more familiar to you.
TimeNet does not do anything other than track time spent and charge an hourly rate. You can add expenses and flat fee items, but that's it. TimeNet also only allows you to invoice one project at a time, and offers no advanced method of tracking partial payments, ongoing cases/matters, retainers, trust funds or escrow funds.
TimeNet Law has lots of great features that attorneys find very useful. Things like trust and escrow accounts, tracking payments of any amount, billing monthly for the same matter (project) that may span several months. You can also do bulk billing (generate 100+ bills at once), and have payments made automatically to matters from trust and/or escrow accounts. TimeNet Law even allows you to have on matter ongoing for many months, generating bills only for specific date ranges, while keeping track of balances, partial payments, deposits to funds, etc.
If you deal with partial payments, need to keep track of any funds (like retainers), plan to generate more than 5-10 bills every month, need conflict of interest checking, need password protection for sensitive clients/matters, like the idea of using shortcuts and abbreviations (for example you can program TimeNet Law to replace "lcdc" with "Lane County District Court", and an infinite amount of others), or any combination of the previous, TimeNet Law may be the better choice for you. If you need to keep detailed notes for tasks, clients and Matters, then you'll like TimeNet Law's large, free-form notes features. TimeNet does not allow you to keep unlimited notes for items.
In addition, TimeNet Law is in rapid development and will continue to add great new features and enhancements that attorneys will find very useful. Conflict of interest checking, reporting, and much, much more are all planned for updates that will be released soon (and all the time, all year, every year). We have never charged for an update in five+ years of selling TimeNet Law, so purchasing TimeNet Law today will ensure that you have the best system for the job, that's going to be well supported and continually evolving.
If you have any more specific questions, or would like to quickly run down the features your firm needs, I'd be happy to discuss in further detail. The standard TimeNet may very well be good enough for what you need.