Re: the Boots DE razor, I have one. But I bought it more for the comb than anything else. Because it is so light to use I am assuming it is tempting to press harder than usual when shaving.
Anyway, a sample pack is the best way. The problem I found is that those blades I liked are no longer available: Gillette Superthins, Gillette 365. But I have put in an order for 7 O'clock greens (mild), 7 O'clock yellows (sharp), Feather (sharpest), Personna Israeli made 'reds' - said to be good, Timor - pricey but good.