I think you would hear loads of difference if you changed your amp - whether you like it is another matter. There are a lot of amps that claim to be transparent and allow the sound of your bass to be louder, so you can clearly hear the difference between basses. All my basses sound different through my HD350.
There are other amps that have a signature sound so whatever bass you plug into the amp it still sound the same. My Peavey T-max, great amp that it was, did this.
If you only use one bass though who gives a f***, so just go with your ears