Hello,
I just bought the second generation and according to asusteka (v. 2 vs. v. 1):
1. 16MB vs. flash memory 128MB,
2. Weaker antennas 2 dbi vs. 5 dbi,
3. Well, USB gen.2 vs.3,
4. The worse firmware support is only 1 realse. vs. 6 versions,
5. Sum such castrate = this equivalent of RT-AC1200 +.
I suspect that the CPU is also worse, but I do not confirm. I will test and see.
If you have to break out in the promo - 33%, then approx.
Greetings