Although both patterns formation is quite same.
1. Ascending broadening wedge ( Trend reversal pattern )
2. Expanding triangle ( Trend continuation pattern )
Ascending broadening wedge forms with the divergence. If 1st impulse is sharp then it gives signal that trend is going to reverse.
Expanding triangle forms most of the time against the divergence. If expanding triangle forms corrective wave at top then it gives signal that price is going to continue with the previous trend.