By your conclusion, games that sell less than 1000 sell more on Switch while bigger games sell more on PS4.
Okay, let's take a look at past multiplat releases :
Opening better on PS4 :
- FIFA 19 (215k vs 8k)
- FIFA 18
- 2K19 (17,7k vs 800)
+1 Sim racer that I forgot the name
--> Sports game performing way better
Opening better Switch :
- Sonic Mania (6750 vs 3000)
- Sonic Forces (3000 vs 1750)
- LA Noire (1840 vs 1631)
- Starlink (1700 vs ) --> that one is special
- My Hero One's Justice (1000 vs 800)
- Valkyria Chronicles 4 (925 vs 575)
+ indies like Owlboy.
Like I said, we'll need more data/time to make a definitive statement. However given other games release it is reasonable to say that games in established/yearly/sports franchises like FIFA, CoD will do better on PS4, that JP games & indies are doing better on Switch (Tales Vesperia will be next imo).
We'll need more time/data to know about games that don't fit in either of these categories. Spain market has always been very strong for portable platforms and for PS so it is not surprising that both are doing very well software wise.