I don't believe so, however the price difference is pretty big. Where I live it's around €350 for the 970, €450 for the 780 ti and €550 for the 980. It would seem that (at least for the time being) the 780 ti is on par if not slightly faster than the gtx 980. I am not entirely sure how much upcoming drivers and better future support for Maxwell might help it swing in favour for the 980, however I do believe the 970 to hit a solid sweet spot. It might depend on the rest of your system configuration, was the defective 970 DOA or did you manage to run it for a while to see if your setup managed to max out the gpu?
Keep in mind if anyone reading this starts to consider choosing between the 780 ti that it does use more power and doesn't come with hdmi 2.0.
Yeah all 980 and 970 cards seem sold out now, but it looks like there's a min $200 price diff between the two. 780ti would mean I'd need a new power supply, plus it's old tech and I believe Eric said he thinks updates to APP could unlock more 900 series capabilities.
See this thread Re: GTX 970 Causes APP 8.1 Instability regarding my card. I guess there's an issue with the card and 32GB ram. Wondering if anyone else is hitting this.