tigerbloom is a base flower nutrient. It will be fine, and should get you through flower, both in hydro and soil. Some strains need more nitrogen/calcium but it's a strain specific thing. When I first switched to hydro i just used tigerbloom in flowering for the first two runs.
bigbloom is a supplement. It doesnt have a lot of nutritional content. it's got wormcastings, kelp, etc, and im assuming some humic. This is a good additive. But if you're using inert soil or hydro, this will not get you through flower. You'd need your base nutrients coming from somewhere else.
Their soluble powders are a moneymaker for them. They're all just monopotassium phosphate powder with a little bit of extras added to slightly tweak the NPK ratios and make you buy three products when you only need one. Your best bet is to buy beastie blooms or GH's koolbloom powder. Honestly, it's all the same stuff. I'd challenge anyone to discern between weed grown using all three, or weed grown using just one.