In Japan, there are games that are coming both for PSVITA and PS4 and the PS4 version costs 1000 or 2000Yen more.
1000Yen is 8.26 dollars or 7.5 euros.
For example, take a look at Gundam Breaker 3 that is coming out next month in Japan
Gundam Breaker 3 PS4 - 8208yen
Gundam Breaker 3 PSVITA - 7344yen
Both versions have the exact some content. The only difference is that PS4 will have better graphics and resolution.