I think Spiller has much more breakout potential than BGE... and BGE's value will drop when Scott returns. I'd stick with Spiller... Furthermore, Spiller's schedule is nice in the coming weeks, could sell higher...
Spiller was a beast to end last year, and with FJax out, could duplicate that success this year and possibly take the reigns. He is younger and on a better deal.
Spiller for sure, in any format. I'm not sure Fred Jackson comes back for the next 5+ weeks, and even if he does, my money is that Spiller keeps the majority of touches that far into the season.