Nice post this. I've had both, the hw77 was tje better engineered rifle and very accurate with superdomes, however.....there was something about my mk1 .22 superstar, lovely looking, it was superbly accurate with domes again, nice safe breach, resettable safety, trigger was a good one, lighter and had character but the maxi grip scope rail was it's downfall, a ridiculous abomination of a feature, being 14mm wide and hard as nails to remove, mounts were a pain even the special BKL wide ones, made replacing the innards a real pain. Do regret selling it last year though. Now have a .177 lgv comp ultra which sadly shoots the pants off the bsa (and standard Hw97k too!)

PS saying that, if I see a mint .22 superstar mk2 carbine I'd probably have it. Saw one at a fair and it had gone within the hour.