I can't confirm for sure whether your Windows software
for the Vectra would run on the HP-150, but I very much doubt it.
I wrote professional programs for the HP-150 at the time it was released, and if I remember correctly it had its very own version of Microsoft MS-DOS which wasn't compatible with the standard version for any other PC-like model from any other vendor. I had to write my own low-level routines to provide Turbo Pascal (also recently released) programs with the ability to handle the graphics screen, the touch screen, and the HP graphics tablet.
It was all very low level, directly calling the HP-150's AGIOS layer (Alpha-Graphic I/O System) to print text to the screen with various attributes (bold, blinking, etc), drawing pixels, lines, circles, and arbitrarily defined areas filled-in or not, as well as detecting screen locations activated via the touch screen. Getting a stream of coordinates from the HP graphics tablet and detecting the stylus being pressed was also a feat.
However, once I had created the appropriate low-level "driver" procedures and functions and the high-level ones calling them, all compiled Turbo Pascal graphics-heavy programs ran smoothly, impressively ("Touch Screen") and real *fast*, to the point that you could even indulge in some eye-catching real-time animation ("morphing!") for the programs' splash screens for instance. This was unheard of and unseen anywhere else at the time. Our clients were absolutely amazed.
In a nutshell: the HP-150 AGIOS layer was so specific to this HP model that I seriously doubt any graphics-heavy software for the Vectra (such as Windows) would ever run in it. It surely requires its very own version. But I may be wrong.
Best regards from V.