Ice Analyzer is basically Compromised Employee for Shapers. However, there are a few differences between the two, some obvious, some more subtle. They are, from most obvious to least (in my opinion):
- Compromised Employee costs 2 to install, while IA is free. However, Compromised Employee can potentially be worth more in the long run, with its 1 for traces, especially against NBN.
- IA's credits can only be spent on installing programs, while Compromised Employee's can be spent for anything, as they're just added to your credit pool.
- IA is virtual so it can survive Sacrificial Clone (as if it matters), while Compromised Employee is a connection and link. Thus, CE is more vulnerable to things like Snatch and Grab, but is also more useful for things like Calling in Favors.
- IA's credits are stored on IA.
That last one can be both good and bad. On the one hand, if it's trashed by, say, Corporate Town, you'll lose all your credits in IA's bank. On the other hand, if you get hit with Closed Accounts, the corp would also have to pay a and 2 per copy of IA with credits on them to completely drain you of your cash available for installs.
Ultimately, I think both cards have their place. In either case, getting them out early is everything. For the most part, I'd just expect IA to be chosen over Compromised Employee for Shapers, and vice-versa for Criminals. Anarachs get their pick between the two, if they really want either, but usually they'd rather spend their influence elsewhere.