It will likely sound better. I wouldn’t worry about the upper rating of the speakers unless you actually crank it to the max. If this is a one time upgrade it will probably sound better, more solid bass… more effortlessness in the sound.
If your long term plan is to improve your system to be much higher quality, then most do in increments. Then this might be a good time to buy a separate amp instead of swapping the whole unit. If you want a really good system someday it will likely consist of a streamer and a higher quality integrated, or more probably a Streamer, DAC, preamp and amp. Generally separates perform significantly better. If you don’t think this is a route your likely to take… your choice sounds good or jumping a bit higher to NADs Master series. My rule of thumb is always at least double your investment if you want to get a “wow!” That sounds a lot better.