In the Software Update app, under File is an 'Ignore Update' option. So just select the Epson update and go select Ignore Update.
Overall, printer drivers are such a PITA that unless there is a reason to update them, I just let them be. On my work Mac, I had defined printers under HP, Dell, Epson, Canon etc and as long as the driver works, I dont update (w/ the exception of my Epson 3800 which I manually update).