I've got both IB & TS accounts.
For equities TS stinks. Very cumbersome plateform, order change is a nightmare, GTC orders don't work (are good for the day only). System gets bogged down and delayed, while IB never does. They go down in totality about the same as of late.
Speed seems to be the same. Short list is about the same (both very good). Commissions are about 25-30% more at TS when everything is added in for my type of trading than at IB.
Daytrading buying power is a joke at TS...if you hold overnight and sell next day, your buying power is still locked up-might as well be trading cash 1x margin. IB frees up BP immediately.
Not real happy with TS....but would like to be. IB is the best, everyone on this board is there, but thats also why you hear more complaints when the go down like today.