How much advantage do you have playing vertical shmups vertically?

Hi,

I'm just wondering how much percentage advantage do you have when playing vertical shmups vertically?

I have put an old 40-inch tv on a rotatable stand and plan to play Switch games like Esp ra.de and Mushihimesama on it, along with using my Optiplex PC set-up on it to play games like Donpachi, DoDonpachi, Espgaluda, Batrider etc etc.

I understand that games will be easier to play rotated since the playfield will be bigger, but Mushihimesama and Esp ra.de on Switch, do not appear to have a bigger playfield when rotated...will this mean it makes no difference playing vertically or horizontally?

What are people's thoughts on this?

Cheers,

Peter