I had long scale RS77LD's on my Fender p-Bass for years. Had them on an'18 Gibson Thunderbird for a couple of years, too; they were on it when I sold it. The long scale Roto 77's are very high tension flats - and yes, they're "bridge cable" stiff. I'm used to stiff flats, though - so, no biggy... The only bass I own now that wears Roto 77's, is my Guild Starfire 1. It wears the medium scale RS77M LDs. I don't think they're particularly stiff; about... average, IMO. They aren't the smoothest flats I use - Galli Jazz Flats wear that crown - but they aren't the roughest ones, either. On that bass? I'm very happy with them... I do have a short scale set in my "Big Box 'O Strings", but... no short scale bass that needs new strings at the moment. When all but a couple of your basses wear flats, that isn't something that happens very often...
As for D'Addario Chromes? I put an old, salvaged long scale set on a G&L ASAT Bass a few years ago - more out of curiosity than anything else. I avoid D'Addario strings, as a rule; why isn't important here. I'll admit to being favorably impressed with them - on
that bass. But, when they finally, actually did die? I replaced them with my general purpose, go-to flats; Fender 9050Ls. Chromes have too much high end - and not enough low end - for me. The ASAT's "sort of" active tone controls could "fix" that, but... IMO, the Fender's just sound better. Speaking of which... sadly, AFAIK Fender does not offer short scale flats. I really wish they did...