This particular screen-shot is probably the coolest Boss preview pic I've seen. At least for a 10 year old back in the day...

I only got to play it via emulation 5 years ago, but personally I liked R-Type II on the Amiga better. Best music of all R-Type II compilations on any system & no slowdowns. Probably the best Arcade port too.
I love the AMIGA title/intro screens:




Super R-Type is not a true R-Type II port imo, as most levels & Bosses have been changed, but the graphics & gameplay are great.