For Vitamins use H&B as they're all good quality and properly dosed unlike the cheap vitamins you can get from other vendors and they always have great deals. The last time I looked boots vits seemed to be overpriced, what exactly are you going to buy? Tigerlelly at a glance your site seems to be daylight robbery, xynergy selenium £17.50 for 50 tabs and it doesn't state what strength they are. H&B selenium £3.29 for 100 50ug or £13.99 for 250 tabs at 200ug!
no they are definately not as good, in fact I read an article once to say they bulk bought and their labels were misleading, I have never bought from them since.
To each his own, if you are happy with their stuff then its fine.