I’m not specifically familiar with this driver but have looked it up. I can’t find any parameters for it but based on efficiency and use, the TD15M is going to be the closest upgrade for it. If you are using it in a bass guitar cabinet the TD15M should be a nice upgrade.
You will notice significantly more accuracy with the TD15M. The K-145 is really designed as a musical instrument driver and as a result not intended to have flat response. All around the TD15M should be a huge upgrade.