That depends on your needs. Cyclerack is bigger, stronger, and more versatile. But I also have an OEM rack that came on my TW when I bought it, and it is adequate for putting a lunch box on or strapping some gear to. It's all about you friend.
p.s. I'm pretty sure you can get an OEM rack for less than $100. Try the classified section first. I think you can even get it as a Yamaha part from somewhere like partzilla.com for better than that. IDK, worth a try.