Zero Gunner 2 on Switch has widescreen support, altered explosion and smoke effects as the game was like remade from scratch by Zerodiv but the way they ported it to Switch caused more minor flaws. Ikaruga falls on the same era as Zero Gunner 2 as they started on Sega Naomi in the arcades before getting console releases on Dreamcast. Ikaruga was also released on other gaming platforms and the Xbox 360 version via XBLA enhances the graphics with Nesica X Live version enhancing the game even more. The Steam version is like definitive if you ask me as it is based on Nesica X Live arcade version which is based on XBLA version. The Switch version is commonly comparable to the Steam version. Like other versions of the game, you get vertical screen orientation support as well as various modes.
I hope the conversion for the Switch version is a decent one when it comes out at the end of this month as from what I saw of gameplay videos of Zero Gunner 2 Switch version, I was disappointed from the way that game was ported with strange way of objects falling for instance.