I have never traded before on any platform other than widely available "retail" trading platforms such as Charles Schwab active trader and Interactive Brokers (Best one I've used). Can one compete with other professional traders using IB platform vs the more specialized, usually more expensive prop firm platforms? Appreciate any opinions, especially from those who have used both.
There's no reason there would be a faster platform than IB, you can't really get faster than instant.
IB great all round platform. For active traders, its far from perfect. Active traders equities: lightspeed,laser,redi..etc Active traders futures: TT X-trader
If you are interested in specialised futures platform, give a try to ButtonTrader - it works exclusively with IB and has a free trial. In terms of usability it's close to X-Trader for 1/10th of the cost.