CDI same for 600 and 750 ? 04 kat 600

[AI9889]

I dont have a title for my katana 600 so Im not 100% sure the year. Its supposed to be a 2003. The CDI is damaged and I need a different one. From the used CDI on ebay it looks like my bike might be an 04. I have one big plug not two smaller plugs on mine. The ebay auction I won says 2004 600 in the title then 04 750 in the description... I already bought n paid for it. Hasnt come in the mail yet.
Is there a difference between the 600 and 750 CDI ?