Tradestation is a programmable trading software, charting, and backtesting package, as well as an order entry system added when they decided to become a broker as well.
IB's TWS is basically a trade entry system (with a number of ways to enter trades) and a relatively simple, non-programmable charting package. It has no backtesting capability.
Both offer special options analysis tools.
IB's datastream is time-sampled so that under busy, very rapid trading you have a much better chance of getting a current price. Tradestation sends all trades in its datastream and can (and does) fall behind in very fast moving, high trading markets.
Your question was not clear as to exactly what you were looking for. Perhaps the above will help.
Jack