Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.
There are a number of reviews out there thatcompare the two cards, do a search and read a couple reviews, you'll probably find your answer. If you have any detailed questions come back and ask, people are much nicer if you spend a little time of your own doing some research.
Depending on your overall system specifications, the GT is significantly more powerful than the 9800. Post your system specs and we will have a better idea regarding your question
In otherwords you may not have a system that can take full advantage of the GT.