Don't know about Buttontrader, but when I used Ninjatrader, Booktrader would get your order to TWS faster than NT... This was a year or two ago...
Tried a number of different settings for BookTrader. Would be still using it today if I hadn't found ButtonTrader. Compared to Ninja Trader, Bracket Trader, etc, I didn't see a big enough advantage to use them instead of BookTrader. There are just too many more benefits using ButtonTrader. Visually, it's just more intuitive.
I wonder why IB does not have reverse stop, trailing stop & strategies in the BookTrader yet. It can not be that hard for their in house programmers.