Kind of a tough decision for me. The 7.7 has battery life, screen quality/resolution, has better tablet app support (1024x600 on the 7.0 makes some apps appear in non-tablet mode), and better build/feel...while the 7.0 fits in my pocket, is cheaper, and doesn't seem to have as many issues (the 7.7 seems to have screen/color issues and overall sluggishness).
Advice? I'd be using it as my primary device (and making phone calls off of it), and I'm looking mostly at the screen size (so phones like the GS3 or Note don't appeal to me).
Advice? I'd be using it as my primary device (and making phone calls off of it), and I'm looking mostly at the screen size (so phones like the GS3 or Note don't appeal to me).