Power ratings in watts has little to do with real world loads. My friend has a Bedini 25x25 and it sounds quite powerful (very good sounding amp). There are many factors at work with a real speaker load. Generally speaking a more powerful version of the same amp should give a more dynamic sound with better bass control. Many speakers benefit from a high current amplifier, especailly those with 4ohm or lower rating. Power rating by watts can be misleading and is not a very reliable way to judge an amps power with any given speaker.
