The fact is, in the same week you have Senran Kagura losing 50k buyers on PSV and gaining 26k buyers on PS4, and also OPM3 performing worse on PSV and PS3 and having "new" buyers on PS4. So you might see some base in my reasoning. I think next multi-platform releases will clarify better this point. I'm expecting PS3/PSV games to skew in favour of PSV in terms of ratio across platforms; while PS4/PSV to skew in favour of PS4.
02./00. [PS3] One Piece: Pirate Warriors 2 # <ACT> (Bandai Namco Games) {2013.03.20} (¥8.190) - 269.035 / NEW
06./00. [PSV] One Piece: Pirate Warriors 2 <ACT> (Bandai Namco Games) {2013.03.20} (¥7.140) - 54.509 / NEW
03./00. [PS3] One Piece: Pirate Warriors 3 <ACT> (Bandai Namco Games) {2015.03.26} (¥8.424) - 81.387 / NEW <60-80%>
08./00. [PSV] One Piece: Pirate Warriors 3 <ACT> (Bandai Namco Games) {2015.03.26} (¥7.344) - 42.845 / NEW <60-80%>
10./00. [PS4] One Piece: Pirate Warriors 3 <ACT> (Bandai Namco Games) {2015.03.26} (¥8.424) - 37.812 / NEW <60-80%>
OPPW is just a case of franchise fatigue, if anything the PSV version is holding better than the home console versions (-56% vs -22%) and one could even argue than some home console users may have migrated to the handheld version instead, at least it seems more likely than the opposite looking at the numbers.
Senran Kagura seems like the only proper example, and even there the franchise fatigue is playing its part and there's also the case of people buying both versions of the game.
03./00. [3DS] Senran Kagura Burst: Guren no Shoujotachi <ACT> (Marvelous AQL) {2012.08.30} (¥5.980) - 70.569 / NEW
03./00. [3DS] Senran Kagura 2: Crimson # <ACT> (Marvelous AQL) {2014.08.07} (¥6.998) - 47.325 / NEW <40-60%>
03./00. [PSV] Senran Kagura Shinovi Versus: Otome Shoujotachi no Shoumei # <ACT> (Marvelous AQL) {2013.02.28} (¥6.980) - 91.639 / NEW
06./00. [PSV] Senran Kagura Estival Versus # <ACT> (Marvelous) {2015.03.26} (¥7.538) - 49.365 / NEW <80-100%>
12./00. [PS4] Senran Kagura Estival Versus # <ACT> (Marvelous) {2015.03.26} (¥8.618) - 26.091 / NEW <80-100%>
Those are completely different cases also but, Gundam Breaker also proved that part of the audience is willing to translate from PS3 to PSV, and God Eater 2 RB showed that its audience is staying on PSV rather than migrating on PS4.
At least if I wanted to spin some numbers without giving much of a context in favour of PSV that's how I would do it, and it seems as legitimate as what you're trying to prove with the supposed PSV->PS3/4 migration.