Here is the information on the machine you received:
http://www.raichert.com/tl2000qi/tl2000qi_juki.html
If you read the first couple of sentences it will tell you that it has a couple of features the 98Q didn't have like LED lights and improved foot control.
The Juki TL2010Q was the machine that replaced the 98Q if you read in the left side column on the description:
http://www.raichert.com/TL2010Q/tl2010.html
I don't think you can go wrong with the machine you received but it is your personal preference that matters. I love my 98Q but as always manufacturers are always trying to improve and upgrade their machines.