I think there is. For about the price of one ISF calibration, you can have a product that will do any display device and last you for years. Besides, SpyderTVPRO will do RGB cuts/gains whereas SpyderTV basically only supports color, tint, contrast and brightness. You can learn how to use SpyderTV's hidden support mode along with rader's spreadsheet or Calman and do a grayscale/gamma calibration that way. rader's is free and Calman will set you back $100.00 so both are attractive options fiscally when compared to SpyderTVPRO. However, if you want the least time consuming and easiest route, then SpyderTVPRO is absolutely the way to go. I have the rader, Calman and SpyderTVPRO options and they are all good and work well and serve essentially the same purpose albeit the road traveled is a little different. rader's spreadsheet and Calman will give you oodles of ways to tweak and learn about your display device. It depends on how much time you want to spend and whether you like a fairly steep learning curve or not. To me, they're all accurate so it comes down to money and time in my estimation. If you are strapped for funds yet have lots of time and are a tweaker at heart, absolutely go for Calman. If you've got the dough but the interest and time don't match the cash, then SpyderTVPRO is for you.
In other words, you don't have to buy SpyderTVPRO if you already have SpyderTV. Just get Calman and utilize the support function hidden within SpyderTV's software. This way you save close to $300.00 on the upgrade path but it will not be anywhere near as easy as if you just upgraded to SpyderTVPRO. Ya makes yer decisions and ya lives with yer consequences.